mirror of https://github.com/python/cpython
1581 lines
64 KiB
Python
1581 lines
64 KiB
Python
# Copyright (C) 2001 Python Software Foundation
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# csv package unit tests
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import copy
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import sys
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import unittest
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from io import StringIO
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from tempfile import TemporaryFile
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import csv
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import gc
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import pickle
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from test import support
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from test.support import import_helper, check_disallow_instantiation
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from itertools import permutations
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from textwrap import dedent
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from collections import OrderedDict
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class BadIterable:
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def __iter__(self):
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raise OSError
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class Test_Csv(unittest.TestCase):
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"""
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Test the underlying C csv parser in ways that are not appropriate
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from the high level interface. Further tests of this nature are done
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in TestDialectRegistry.
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"""
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def _test_arg_valid(self, ctor, arg):
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ctor(arg)
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self.assertRaises(TypeError, ctor)
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self.assertRaises(TypeError, ctor, None)
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self.assertRaises(TypeError, ctor, arg, bad_attr=0)
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self.assertRaises(TypeError, ctor, arg, delimiter='')
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self.assertRaises(TypeError, ctor, arg, escapechar='')
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self.assertRaises(TypeError, ctor, arg, quotechar='')
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self.assertRaises(TypeError, ctor, arg, delimiter='^^')
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self.assertRaises(TypeError, ctor, arg, escapechar='^^')
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self.assertRaises(TypeError, ctor, arg, quotechar='^^')
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self.assertRaises(csv.Error, ctor, arg, 'foo')
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self.assertRaises(TypeError, ctor, arg, delimiter=None)
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self.assertRaises(TypeError, ctor, arg, delimiter=1)
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self.assertRaises(TypeError, ctor, arg, escapechar=1)
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self.assertRaises(TypeError, ctor, arg, quotechar=1)
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self.assertRaises(TypeError, ctor, arg, lineterminator=None)
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self.assertRaises(TypeError, ctor, arg, lineterminator=1)
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self.assertRaises(TypeError, ctor, arg, quoting=None)
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self.assertRaises(TypeError, ctor, arg,
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quoting=csv.QUOTE_ALL, quotechar='')
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self.assertRaises(TypeError, ctor, arg,
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quoting=csv.QUOTE_ALL, quotechar=None)
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self.assertRaises(TypeError, ctor, arg,
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quoting=csv.QUOTE_NONE, quotechar='')
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self.assertRaises(ValueError, ctor, arg, delimiter='\n')
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self.assertRaises(ValueError, ctor, arg, escapechar='\n')
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self.assertRaises(ValueError, ctor, arg, quotechar='\n')
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self.assertRaises(ValueError, ctor, arg, delimiter='\r')
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self.assertRaises(ValueError, ctor, arg, escapechar='\r')
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self.assertRaises(ValueError, ctor, arg, quotechar='\r')
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ctor(arg, delimiter=' ')
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ctor(arg, escapechar=' ')
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ctor(arg, quotechar=' ')
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ctor(arg, delimiter='\t', skipinitialspace=True)
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ctor(arg, escapechar='\t', skipinitialspace=True)
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ctor(arg, quotechar='\t', skipinitialspace=True)
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ctor(arg, delimiter=' ', skipinitialspace=True)
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self.assertRaises(ValueError, ctor, arg,
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escapechar=' ', skipinitialspace=True)
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self.assertRaises(ValueError, ctor, arg,
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quotechar=' ', skipinitialspace=True)
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ctor(arg, delimiter='^')
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ctor(arg, escapechar='^')
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ctor(arg, quotechar='^')
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self.assertRaises(ValueError, ctor, arg, delimiter='^', escapechar='^')
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self.assertRaises(ValueError, ctor, arg, delimiter='^', quotechar='^')
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self.assertRaises(ValueError, ctor, arg, escapechar='^', quotechar='^')
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ctor(arg, delimiter='\x85')
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ctor(arg, escapechar='\x85')
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ctor(arg, quotechar='\x85')
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ctor(arg, lineterminator='\x85')
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self.assertRaises(ValueError, ctor, arg,
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delimiter='\x85', lineterminator='\x85')
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self.assertRaises(ValueError, ctor, arg,
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escapechar='\x85', lineterminator='\x85')
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self.assertRaises(ValueError, ctor, arg,
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quotechar='\x85', lineterminator='\x85')
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def test_reader_arg_valid(self):
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self._test_arg_valid(csv.reader, [])
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self.assertRaises(OSError, csv.reader, BadIterable())
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def test_writer_arg_valid(self):
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self._test_arg_valid(csv.writer, StringIO())
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class BadWriter:
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@property
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def write(self):
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raise OSError
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self.assertRaises(OSError, csv.writer, BadWriter())
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def _test_default_attrs(self, ctor, *args):
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obj = ctor(*args)
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# Check defaults
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self.assertEqual(obj.dialect.delimiter, ',')
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self.assertIs(obj.dialect.doublequote, True)
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self.assertEqual(obj.dialect.escapechar, None)
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self.assertEqual(obj.dialect.lineterminator, "\r\n")
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self.assertEqual(obj.dialect.quotechar, '"')
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self.assertEqual(obj.dialect.quoting, csv.QUOTE_MINIMAL)
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self.assertIs(obj.dialect.skipinitialspace, False)
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self.assertIs(obj.dialect.strict, False)
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# Try deleting or changing attributes (they are read-only)
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self.assertRaises(AttributeError, delattr, obj.dialect, 'delimiter')
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self.assertRaises(AttributeError, setattr, obj.dialect, 'delimiter', ':')
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self.assertRaises(AttributeError, delattr, obj.dialect, 'quoting')
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self.assertRaises(AttributeError, setattr, obj.dialect,
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'quoting', None)
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def test_reader_attrs(self):
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self._test_default_attrs(csv.reader, [])
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def test_writer_attrs(self):
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self._test_default_attrs(csv.writer, StringIO())
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def _test_kw_attrs(self, ctor, *args):
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# Now try with alternate options
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kwargs = dict(delimiter=':', doublequote=False, escapechar='\\',
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lineterminator='\r', quotechar='*',
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quoting=csv.QUOTE_NONE, skipinitialspace=True,
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strict=True)
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obj = ctor(*args, **kwargs)
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self.assertEqual(obj.dialect.delimiter, ':')
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self.assertIs(obj.dialect.doublequote, False)
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self.assertEqual(obj.dialect.escapechar, '\\')
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self.assertEqual(obj.dialect.lineterminator, "\r")
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self.assertEqual(obj.dialect.quotechar, '*')
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self.assertEqual(obj.dialect.quoting, csv.QUOTE_NONE)
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self.assertIs(obj.dialect.skipinitialspace, True)
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self.assertIs(obj.dialect.strict, True)
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def test_reader_kw_attrs(self):
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self._test_kw_attrs(csv.reader, [])
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def test_writer_kw_attrs(self):
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self._test_kw_attrs(csv.writer, StringIO())
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def _test_dialect_attrs(self, ctor, *args):
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# Now try with dialect-derived options
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class dialect:
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delimiter='-'
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doublequote=False
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escapechar='^'
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lineterminator='$'
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quotechar='#'
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quoting=csv.QUOTE_ALL
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skipinitialspace=True
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strict=False
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args = args + (dialect,)
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obj = ctor(*args)
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self.assertEqual(obj.dialect.delimiter, '-')
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self.assertIs(obj.dialect.doublequote, False)
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self.assertEqual(obj.dialect.escapechar, '^')
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self.assertEqual(obj.dialect.lineterminator, "$")
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self.assertEqual(obj.dialect.quotechar, '#')
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self.assertEqual(obj.dialect.quoting, csv.QUOTE_ALL)
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self.assertIs(obj.dialect.skipinitialspace, True)
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self.assertIs(obj.dialect.strict, False)
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def test_reader_dialect_attrs(self):
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self._test_dialect_attrs(csv.reader, [])
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def test_writer_dialect_attrs(self):
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self._test_dialect_attrs(csv.writer, StringIO())
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def _write_test(self, fields, expect, **kwargs):
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with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
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writer = csv.writer(fileobj, **kwargs)
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writer.writerow(fields)
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fileobj.seek(0)
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self.assertEqual(fileobj.read(),
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expect + writer.dialect.lineterminator)
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def _write_error_test(self, exc, fields, **kwargs):
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with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
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writer = csv.writer(fileobj, **kwargs)
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with self.assertRaises(exc):
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writer.writerow(fields)
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fileobj.seek(0)
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self.assertEqual(fileobj.read(), '')
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def test_write_arg_valid(self):
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self._write_error_test(csv.Error, None)
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# Check that exceptions are passed up the chain
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self._write_error_test(OSError, BadIterable())
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class BadList:
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def __len__(self):
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return 10
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def __getitem__(self, i):
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if i > 2:
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raise OSError
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self._write_error_test(OSError, BadList())
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class BadItem:
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def __str__(self):
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raise OSError
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self._write_error_test(OSError, [BadItem()])
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def test_write_bigfield(self):
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# This exercises the buffer realloc functionality
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bigstring = 'X' * 50000
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self._write_test([bigstring,bigstring], '%s,%s' % \
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(bigstring, bigstring))
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def test_write_quoting(self):
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self._write_test(['a',1,'p,q'], 'a,1,"p,q"')
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self._write_error_test(csv.Error, ['a',1,'p,q'],
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quoting = csv.QUOTE_NONE)
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self._write_test(['a',1,'p,q'], 'a,1,"p,q"',
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quoting = csv.QUOTE_MINIMAL)
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self._write_test(['a',1,'p,q'], '"a",1,"p,q"',
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quoting = csv.QUOTE_NONNUMERIC)
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self._write_test(['a',1,'p,q'], '"a","1","p,q"',
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quoting = csv.QUOTE_ALL)
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self._write_test(['a\nb',1], '"a\nb","1"',
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quoting = csv.QUOTE_ALL)
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self._write_test(['a','',None,1], '"a","",,1',
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quoting = csv.QUOTE_STRINGS)
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self._write_test(['a','',None,1], '"a","",,"1"',
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quoting = csv.QUOTE_NOTNULL)
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def test_write_escape(self):
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self._write_test(['a',1,'p,q'], 'a,1,"p,q"',
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escapechar='\\')
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self._write_error_test(csv.Error, ['a',1,'p,"q"'],
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escapechar=None, doublequote=False)
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self._write_test(['a',1,'p,"q"'], 'a,1,"p,\\"q\\""',
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escapechar='\\', doublequote = False)
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self._write_test(['"'], '""""',
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escapechar='\\', quoting = csv.QUOTE_MINIMAL)
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self._write_test(['"'], '\\"',
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escapechar='\\', quoting = csv.QUOTE_MINIMAL,
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doublequote = False)
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self._write_test(['"'], '\\"',
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escapechar='\\', quoting = csv.QUOTE_NONE)
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self._write_test(['a',1,'p,q'], 'a,1,p\\,q',
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escapechar='\\', quoting = csv.QUOTE_NONE)
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self._write_test(['\\', 'a'], '\\\\,a',
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escapechar='\\', quoting=csv.QUOTE_NONE)
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self._write_test(['\\', 'a'], '\\\\,a',
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escapechar='\\', quoting=csv.QUOTE_MINIMAL)
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self._write_test(['\\', 'a'], '"\\\\","a"',
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escapechar='\\', quoting=csv.QUOTE_ALL)
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self._write_test(['\\ ', 'a'], '\\\\ ,a',
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escapechar='\\', quoting=csv.QUOTE_MINIMAL)
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self._write_test(['\\,', 'a'], '\\\\\\,,a',
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escapechar='\\', quoting=csv.QUOTE_NONE)
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self._write_test([',\\', 'a'], '",\\\\",a',
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escapechar='\\', quoting=csv.QUOTE_MINIMAL)
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self._write_test(['C\\', '6', '7', 'X"'], 'C\\\\,6,7,"X"""',
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escapechar='\\', quoting=csv.QUOTE_MINIMAL)
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def test_write_lineterminator(self):
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for lineterminator in '\r\n', '\n', '\r', '!@#', '\0':
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with self.subTest(lineterminator=lineterminator):
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with StringIO() as sio:
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writer = csv.writer(sio, lineterminator=lineterminator)
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writer.writerow(['a', 'b'])
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writer.writerow([1, 2])
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writer.writerow(['\r', '\n'])
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self.assertEqual(sio.getvalue(),
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f'a,b{lineterminator}'
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f'1,2{lineterminator}'
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f'"\r","\n"{lineterminator}')
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def test_write_iterable(self):
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self._write_test(iter(['a', 1, 'p,q']), 'a,1,"p,q"')
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self._write_test(iter(['a', 1, None]), 'a,1,')
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self._write_test(iter([]), '')
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self._write_test(iter([None]), '""')
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self._write_error_test(csv.Error, iter([None]), quoting=csv.QUOTE_NONE)
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self._write_test(iter([None, None]), ',')
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def test_writerows(self):
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class BrokenFile:
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def write(self, buf):
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raise OSError
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writer = csv.writer(BrokenFile())
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self.assertRaises(OSError, writer.writerows, [['a']])
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with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
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writer = csv.writer(fileobj)
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self.assertRaises(TypeError, writer.writerows, None)
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writer.writerows([['a', 'b'], ['c', 'd']])
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fileobj.seek(0)
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self.assertEqual(fileobj.read(), "a,b\r\nc,d\r\n")
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def test_writerows_with_none(self):
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with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
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writer = csv.writer(fileobj)
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writer.writerows([['a', None], [None, 'd']])
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fileobj.seek(0)
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self.assertEqual(fileobj.read(), "a,\r\n,d\r\n")
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with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
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writer = csv.writer(fileobj)
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writer.writerows([[None], ['a']])
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fileobj.seek(0)
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self.assertEqual(fileobj.read(), '""\r\na\r\n')
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with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
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writer = csv.writer(fileobj)
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writer.writerows([['a'], [None]])
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fileobj.seek(0)
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self.assertEqual(fileobj.read(), 'a\r\n""\r\n')
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def test_write_empty_fields(self):
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self._write_test((), '')
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self._write_test([''], '""')
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self._write_error_test(csv.Error, [''], quoting=csv.QUOTE_NONE)
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self._write_test([''], '""', quoting=csv.QUOTE_STRINGS)
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self._write_test([''], '""', quoting=csv.QUOTE_NOTNULL)
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self._write_test([None], '""')
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self._write_error_test(csv.Error, [None], quoting=csv.QUOTE_NONE)
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self._write_error_test(csv.Error, [None], quoting=csv.QUOTE_STRINGS)
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self._write_error_test(csv.Error, [None], quoting=csv.QUOTE_NOTNULL)
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self._write_test(['', ''], ',')
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self._write_test([None, None], ',')
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def test_write_empty_fields_space_delimiter(self):
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self._write_test([''], '""', delimiter=' ', skipinitialspace=False)
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self._write_test([''], '""', delimiter=' ', skipinitialspace=True)
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self._write_test([None], '""', delimiter=' ', skipinitialspace=False)
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self._write_test([None], '""', delimiter=' ', skipinitialspace=True)
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self._write_test(['', ''], ' ', delimiter=' ', skipinitialspace=False)
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self._write_test(['', ''], '"" ""', delimiter=' ', skipinitialspace=True)
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self._write_test([None, None], ' ', delimiter=' ', skipinitialspace=False)
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self._write_test([None, None], '"" ""', delimiter=' ', skipinitialspace=True)
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self._write_test(['', ''], ' ', delimiter=' ', skipinitialspace=False,
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quoting=csv.QUOTE_NONE)
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self._write_error_test(csv.Error, ['', ''],
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delimiter=' ', skipinitialspace=True,
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quoting=csv.QUOTE_NONE)
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for quoting in csv.QUOTE_STRINGS, csv.QUOTE_NOTNULL:
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self._write_test(['', ''], '"" ""', delimiter=' ', skipinitialspace=False,
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quoting=quoting)
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self._write_test(['', ''], '"" ""', delimiter=' ', skipinitialspace=True,
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quoting=quoting)
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for quoting in csv.QUOTE_NONE, csv.QUOTE_STRINGS, csv.QUOTE_NOTNULL:
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self._write_test([None, None], ' ', delimiter=' ', skipinitialspace=False,
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quoting=quoting)
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self._write_error_test(csv.Error, [None, None],
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delimiter=' ', skipinitialspace=True,
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quoting=quoting)
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def test_writerows_errors(self):
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with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
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writer = csv.writer(fileobj)
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self.assertRaises(TypeError, writer.writerows, None)
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self.assertRaises(OSError, writer.writerows, BadIterable())
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def _read_test(self, input, expect, **kwargs):
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reader = csv.reader(input, **kwargs)
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result = list(reader)
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self.assertEqual(result, expect)
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def test_read_oddinputs(self):
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self._read_test([], [])
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self._read_test([''], [[]])
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self.assertRaises(csv.Error, self._read_test,
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['"ab"c'], None, strict = 1)
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self._read_test(['"ab"c'], [['abc']], doublequote = 0)
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self.assertRaises(csv.Error, self._read_test,
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[b'abc'], None)
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def test_read_eol(self):
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self._read_test(['a,b', 'c,d'], [['a','b'], ['c','d']])
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self._read_test(['a,b\n', 'c,d\n'], [['a','b'], ['c','d']])
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self._read_test(['a,b\r\n', 'c,d\r\n'], [['a','b'], ['c','d']])
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self._read_test(['a,b\r', 'c,d\r'], [['a','b'], ['c','d']])
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errmsg = "with newline=''"
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with self.assertRaisesRegex(csv.Error, errmsg):
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next(csv.reader(['a,b\rc,d']))
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with self.assertRaisesRegex(csv.Error, errmsg):
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next(csv.reader(['a,b\nc,d']))
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with self.assertRaisesRegex(csv.Error, errmsg):
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next(csv.reader(['a,b\r\nc,d']))
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def test_read_eof(self):
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self._read_test(['a,"'], [['a', '']])
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self._read_test(['"a'], [['a']])
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self._read_test(['^'], [['\n']], escapechar='^')
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self.assertRaises(csv.Error, self._read_test, ['a,"'], [], strict=True)
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self.assertRaises(csv.Error, self._read_test, ['"a'], [], strict=True)
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self.assertRaises(csv.Error, self._read_test,
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['^'], [], escapechar='^', strict=True)
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def test_read_nul(self):
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self._read_test(['\0'], [['\0']])
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self._read_test(['a,\0b,c'], [['a', '\0b', 'c']])
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self._read_test(['a,b\0,c'], [['a', 'b\0', 'c']])
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self._read_test(['a,b\\\0,c'], [['a', 'b\0', 'c']], escapechar='\\')
|
|
self._read_test(['a,"\0b",c'], [['a', '\0b', 'c']])
|
|
|
|
def test_read_delimiter(self):
|
|
self._read_test(['a,b,c'], [['a', 'b', 'c']])
|
|
self._read_test(['a;b;c'], [['a', 'b', 'c']], delimiter=';')
|
|
self._read_test(['a\0b\0c'], [['a', 'b', 'c']], delimiter='\0')
|
|
|
|
def test_read_escape(self):
|
|
self._read_test(['a,\\b,c'], [['a', 'b', 'c']], escapechar='\\')
|
|
self._read_test(['a,b\\,c'], [['a', 'b,c']], escapechar='\\')
|
|
self._read_test(['a,"b\\,c"'], [['a', 'b,c']], escapechar='\\')
|
|
self._read_test(['a,"b,\\c"'], [['a', 'b,c']], escapechar='\\')
|
|
self._read_test(['a,"b,c\\""'], [['a', 'b,c"']], escapechar='\\')
|
|
self._read_test(['a,"b,c"\\'], [['a', 'b,c\\']], escapechar='\\')
|
|
self._read_test(['a,^b,c'], [['a', 'b', 'c']], escapechar='^')
|
|
self._read_test(['a,\0b,c'], [['a', 'b', 'c']], escapechar='\0')
|
|
self._read_test(['a,\\b,c'], [['a', '\\b', 'c']], escapechar=None)
|
|
self._read_test(['a,\\b,c'], [['a', '\\b', 'c']])
|
|
|
|
def test_read_quoting(self):
|
|
self._read_test(['1,",3,",5'], [['1', ',3,', '5']])
|
|
self._read_test(['1,",3,",5'], [['1', '"', '3', '"', '5']],
|
|
quotechar=None, escapechar='\\')
|
|
self._read_test(['1,",3,",5'], [['1', '"', '3', '"', '5']],
|
|
quoting=csv.QUOTE_NONE, escapechar='\\')
|
|
# will this fail where locale uses comma for decimals?
|
|
self._read_test([',3,"5",7.3, 9'], [['', 3, '5', 7.3, 9]],
|
|
quoting=csv.QUOTE_NONNUMERIC)
|
|
self._read_test([',3,"5",7.3, 9'], [[None, '3', '5', '7.3', ' 9']],
|
|
quoting=csv.QUOTE_NOTNULL)
|
|
self._read_test([',3,"5",7.3, 9'], [[None, 3, '5', 7.3, 9]],
|
|
quoting=csv.QUOTE_STRINGS)
|
|
|
|
self._read_test([',,"",'], [['', '', '', '']])
|
|
self._read_test([',,"",'], [['', '', '', '']],
|
|
quoting=csv.QUOTE_NONNUMERIC)
|
|
self._read_test([',,"",'], [[None, None, '', None]],
|
|
quoting=csv.QUOTE_NOTNULL)
|
|
self._read_test([',,"",'], [[None, None, '', None]],
|
|
quoting=csv.QUOTE_STRINGS)
|
|
|
|
self._read_test(['"a\nb", 7'], [['a\nb', ' 7']])
|
|
self.assertRaises(ValueError, self._read_test,
|
|
['abc,3'], [[]],
|
|
quoting=csv.QUOTE_NONNUMERIC)
|
|
self.assertRaises(ValueError, self._read_test,
|
|
['abc,3'], [[]],
|
|
quoting=csv.QUOTE_STRINGS)
|
|
self._read_test(['1,@,3,@,5'], [['1', ',3,', '5']], quotechar='@')
|
|
self._read_test(['1,\0,3,\0,5'], [['1', ',3,', '5']], quotechar='\0')
|
|
self._read_test(['1\\.5,\\.5,.5'], [[1.5, 0.5, 0.5]],
|
|
quoting=csv.QUOTE_NONNUMERIC, escapechar='\\')
|
|
self._read_test(['1\\.5,\\.5,"\\.5"'], [[1.5, 0.5, ".5"]],
|
|
quoting=csv.QUOTE_STRINGS, escapechar='\\')
|
|
|
|
def test_read_skipinitialspace(self):
|
|
self._read_test(['no space, space, spaces,\ttab'],
|
|
[['no space', 'space', 'spaces', '\ttab']],
|
|
skipinitialspace=True)
|
|
self._read_test([' , , '],
|
|
[['', '', '']],
|
|
skipinitialspace=True)
|
|
self._read_test([' , , '],
|
|
[[None, None, None]],
|
|
skipinitialspace=True, quoting=csv.QUOTE_NOTNULL)
|
|
self._read_test([' , , '],
|
|
[[None, None, None]],
|
|
skipinitialspace=True, quoting=csv.QUOTE_STRINGS)
|
|
|
|
def test_read_space_delimiter(self):
|
|
self._read_test(['a b', ' a ', ' ', ''],
|
|
[['a', '', '', 'b'], ['', '', 'a', '', ''], ['', '', ''], []],
|
|
delimiter=' ', skipinitialspace=False)
|
|
self._read_test(['a b', ' a ', ' ', ''],
|
|
[['a', 'b'], ['a', ''], [''], []],
|
|
delimiter=' ', skipinitialspace=True)
|
|
|
|
def test_read_bigfield(self):
|
|
# This exercises the buffer realloc functionality and field size
|
|
# limits.
|
|
limit = csv.field_size_limit()
|
|
try:
|
|
size = 50000
|
|
bigstring = 'X' * size
|
|
bigline = '%s,%s' % (bigstring, bigstring)
|
|
self._read_test([bigline], [[bigstring, bigstring]])
|
|
csv.field_size_limit(size)
|
|
self._read_test([bigline], [[bigstring, bigstring]])
|
|
self.assertEqual(csv.field_size_limit(), size)
|
|
csv.field_size_limit(size-1)
|
|
self.assertRaises(csv.Error, self._read_test, [bigline], [])
|
|
self.assertRaises(TypeError, csv.field_size_limit, None)
|
|
self.assertRaises(TypeError, csv.field_size_limit, 1, None)
|
|
finally:
|
|
csv.field_size_limit(limit)
|
|
|
|
def test_read_linenum(self):
|
|
r = csv.reader(['line,1', 'line,2', 'line,3'])
|
|
self.assertEqual(r.line_num, 0)
|
|
next(r)
|
|
self.assertEqual(r.line_num, 1)
|
|
next(r)
|
|
self.assertEqual(r.line_num, 2)
|
|
next(r)
|
|
self.assertEqual(r.line_num, 3)
|
|
self.assertRaises(StopIteration, next, r)
|
|
self.assertEqual(r.line_num, 3)
|
|
|
|
def test_roundtrip_quoteed_newlines(self):
|
|
rows = [
|
|
['\na', 'b\nc', 'd\n'],
|
|
['\re', 'f\rg', 'h\r'],
|
|
['\r\ni', 'j\r\nk', 'l\r\n'],
|
|
['\n\rm', 'n\n\ro', 'p\n\r'],
|
|
['\r\rq', 'r\r\rs', 't\r\r'],
|
|
['\n\nu', 'v\n\nw', 'x\n\n'],
|
|
]
|
|
for lineterminator in '\r\n', '\n', '\r':
|
|
with self.subTest(lineterminator=lineterminator):
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.writer(fileobj, lineterminator=lineterminator)
|
|
writer.writerows(rows)
|
|
fileobj.seek(0)
|
|
for i, row in enumerate(csv.reader(fileobj)):
|
|
self.assertEqual(row, rows[i])
|
|
|
|
def test_roundtrip_escaped_unquoted_newlines(self):
|
|
rows = [
|
|
['\na', 'b\nc', 'd\n'],
|
|
['\re', 'f\rg', 'h\r'],
|
|
['\r\ni', 'j\r\nk', 'l\r\n'],
|
|
['\n\rm', 'n\n\ro', 'p\n\r'],
|
|
['\r\rq', 'r\r\rs', 't\r\r'],
|
|
['\n\nu', 'v\n\nw', 'x\n\n'],
|
|
]
|
|
for lineterminator in '\r\n', '\n', '\r':
|
|
with self.subTest(lineterminator=lineterminator):
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.writer(fileobj, lineterminator=lineterminator,
|
|
quoting=csv.QUOTE_NONE, escapechar="\\")
|
|
writer.writerows(rows)
|
|
fileobj.seek(0)
|
|
for i, row in enumerate(csv.reader(fileobj,
|
|
quoting=csv.QUOTE_NONE,
|
|
escapechar="\\")):
|
|
self.assertEqual(row, rows[i])
|
|
|
|
|
|
class TestDialectRegistry(unittest.TestCase):
|
|
def test_registry_badargs(self):
|
|
self.assertRaises(TypeError, csv.list_dialects, None)
|
|
self.assertRaises(TypeError, csv.get_dialect)
|
|
self.assertRaises(csv.Error, csv.get_dialect, None)
|
|
self.assertRaises(csv.Error, csv.get_dialect, "nonesuch")
|
|
self.assertRaises(TypeError, csv.unregister_dialect)
|
|
self.assertRaises(csv.Error, csv.unregister_dialect, None)
|
|
self.assertRaises(csv.Error, csv.unregister_dialect, "nonesuch")
|
|
self.assertRaises(TypeError, csv.register_dialect, None)
|
|
self.assertRaises(TypeError, csv.register_dialect, None, None)
|
|
self.assertRaises(TypeError, csv.register_dialect, "nonesuch", 0, 0)
|
|
self.assertRaises(TypeError, csv.register_dialect, "nonesuch",
|
|
badargument=None)
|
|
self.assertRaises(TypeError, csv.register_dialect, "nonesuch",
|
|
quoting=None)
|
|
self.assertRaises(TypeError, csv.register_dialect, [])
|
|
|
|
def test_registry(self):
|
|
class myexceltsv(csv.excel):
|
|
delimiter = "\t"
|
|
name = "myexceltsv"
|
|
expected_dialects = csv.list_dialects() + [name]
|
|
expected_dialects.sort()
|
|
csv.register_dialect(name, myexceltsv)
|
|
self.addCleanup(csv.unregister_dialect, name)
|
|
self.assertEqual(csv.get_dialect(name).delimiter, '\t')
|
|
got_dialects = sorted(csv.list_dialects())
|
|
self.assertEqual(expected_dialects, got_dialects)
|
|
|
|
def test_register_kwargs(self):
|
|
name = 'fedcba'
|
|
csv.register_dialect(name, delimiter=';')
|
|
self.addCleanup(csv.unregister_dialect, name)
|
|
self.assertEqual(csv.get_dialect(name).delimiter, ';')
|
|
self.assertEqual([['X', 'Y', 'Z']], list(csv.reader(['X;Y;Z'], name)))
|
|
|
|
def test_register_kwargs_override(self):
|
|
class mydialect(csv.Dialect):
|
|
delimiter = "\t"
|
|
quotechar = '"'
|
|
doublequote = True
|
|
skipinitialspace = False
|
|
lineterminator = '\r\n'
|
|
quoting = csv.QUOTE_MINIMAL
|
|
|
|
name = 'test_dialect'
|
|
csv.register_dialect(name, mydialect,
|
|
delimiter=';',
|
|
quotechar="'",
|
|
doublequote=False,
|
|
skipinitialspace=True,
|
|
lineterminator='\n',
|
|
quoting=csv.QUOTE_ALL)
|
|
self.addCleanup(csv.unregister_dialect, name)
|
|
|
|
# Ensure that kwargs do override attributes of a dialect class:
|
|
dialect = csv.get_dialect(name)
|
|
self.assertEqual(dialect.delimiter, ';')
|
|
self.assertEqual(dialect.quotechar, "'")
|
|
self.assertEqual(dialect.doublequote, False)
|
|
self.assertEqual(dialect.skipinitialspace, True)
|
|
self.assertEqual(dialect.lineterminator, '\n')
|
|
self.assertEqual(dialect.quoting, csv.QUOTE_ALL)
|
|
|
|
def test_incomplete_dialect(self):
|
|
class myexceltsv(csv.Dialect):
|
|
delimiter = "\t"
|
|
self.assertRaises(csv.Error, myexceltsv)
|
|
|
|
def test_space_dialect(self):
|
|
class space(csv.excel):
|
|
delimiter = " "
|
|
quoting = csv.QUOTE_NONE
|
|
escapechar = "\\"
|
|
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("abc def\nc1ccccc1 benzene\n")
|
|
fileobj.seek(0)
|
|
reader = csv.reader(fileobj, dialect=space())
|
|
self.assertEqual(next(reader), ["abc", "", "", "def"])
|
|
self.assertEqual(next(reader), ["c1ccccc1", "benzene"])
|
|
|
|
def compare_dialect_123(self, expected, *writeargs, **kwwriteargs):
|
|
|
|
with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj:
|
|
|
|
writer = csv.writer(fileobj, *writeargs, **kwwriteargs)
|
|
writer.writerow([1,2,3])
|
|
fileobj.seek(0)
|
|
self.assertEqual(fileobj.read(), expected)
|
|
|
|
def test_dialect_apply(self):
|
|
class testA(csv.excel):
|
|
delimiter = "\t"
|
|
class testB(csv.excel):
|
|
delimiter = ":"
|
|
class testC(csv.excel):
|
|
delimiter = "|"
|
|
class testUni(csv.excel):
|
|
delimiter = "\u039B"
|
|
|
|
class unspecified():
|
|
# A class to pass as dialect but with no dialect attributes.
|
|
pass
|
|
|
|
csv.register_dialect('testC', testC)
|
|
try:
|
|
self.compare_dialect_123("1,2,3\r\n")
|
|
self.compare_dialect_123("1,2,3\r\n", dialect=None)
|
|
self.compare_dialect_123("1,2,3\r\n", dialect=unspecified)
|
|
self.compare_dialect_123("1\t2\t3\r\n", testA)
|
|
self.compare_dialect_123("1:2:3\r\n", dialect=testB())
|
|
self.compare_dialect_123("1|2|3\r\n", dialect='testC')
|
|
self.compare_dialect_123("1;2;3\r\n", dialect=testA,
|
|
delimiter=';')
|
|
self.compare_dialect_123("1\u039B2\u039B3\r\n",
|
|
dialect=testUni)
|
|
|
|
finally:
|
|
csv.unregister_dialect('testC')
|
|
|
|
def test_copy(self):
|
|
for name in csv.list_dialects():
|
|
dialect = csv.get_dialect(name)
|
|
self.assertRaises(TypeError, copy.copy, dialect)
|
|
|
|
def test_pickle(self):
|
|
for name in csv.list_dialects():
|
|
dialect = csv.get_dialect(name)
|
|
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
|
|
self.assertRaises(TypeError, pickle.dumps, dialect, proto)
|
|
|
|
class TestCsvBase(unittest.TestCase):
|
|
def readerAssertEqual(self, input, expected_result):
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
fileobj.write(input)
|
|
fileobj.seek(0)
|
|
reader = csv.reader(fileobj, dialect = self.dialect)
|
|
fields = list(reader)
|
|
self.assertEqual(fields, expected_result)
|
|
|
|
def writerAssertEqual(self, input, expected_result):
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.writer(fileobj, dialect = self.dialect)
|
|
writer.writerows(input)
|
|
fileobj.seek(0)
|
|
self.assertEqual(fileobj.read(), expected_result)
|
|
|
|
class TestDialectExcel(TestCsvBase):
|
|
dialect = 'excel'
|
|
|
|
def test_single(self):
|
|
self.readerAssertEqual('abc', [['abc']])
|
|
|
|
def test_simple(self):
|
|
self.readerAssertEqual('1,2,3,4,5', [['1','2','3','4','5']])
|
|
|
|
def test_blankline(self):
|
|
self.readerAssertEqual('', [])
|
|
|
|
def test_empty_fields(self):
|
|
self.readerAssertEqual(',', [['', '']])
|
|
|
|
def test_singlequoted(self):
|
|
self.readerAssertEqual('""', [['']])
|
|
|
|
def test_singlequoted_left_empty(self):
|
|
self.readerAssertEqual('"",', [['','']])
|
|
|
|
def test_singlequoted_right_empty(self):
|
|
self.readerAssertEqual(',""', [['','']])
|
|
|
|
def test_single_quoted_quote(self):
|
|
self.readerAssertEqual('""""', [['"']])
|
|
|
|
def test_quoted_quotes(self):
|
|
self.readerAssertEqual('""""""', [['""']])
|
|
|
|
def test_inline_quote(self):
|
|
self.readerAssertEqual('a""b', [['a""b']])
|
|
|
|
def test_inline_quotes(self):
|
|
self.readerAssertEqual('a"b"c', [['a"b"c']])
|
|
|
|
def test_quotes_and_more(self):
|
|
# Excel would never write a field containing '"a"b', but when
|
|
# reading one, it will return 'ab'.
|
|
self.readerAssertEqual('"a"b', [['ab']])
|
|
|
|
def test_lone_quote(self):
|
|
self.readerAssertEqual('a"b', [['a"b']])
|
|
|
|
def test_quote_and_quote(self):
|
|
# Excel would never write a field containing '"a" "b"', but when
|
|
# reading one, it will return 'a "b"'.
|
|
self.readerAssertEqual('"a" "b"', [['a "b"']])
|
|
|
|
def test_space_and_quote(self):
|
|
self.readerAssertEqual(' "a"', [[' "a"']])
|
|
|
|
def test_quoted(self):
|
|
self.readerAssertEqual('1,2,3,"I think, therefore I am",5,6',
|
|
[['1', '2', '3',
|
|
'I think, therefore I am',
|
|
'5', '6']])
|
|
|
|
def test_quoted_quote(self):
|
|
self.readerAssertEqual('1,2,3,"""I see,"" said the blind man","as he picked up his hammer and saw"',
|
|
[['1', '2', '3',
|
|
'"I see," said the blind man',
|
|
'as he picked up his hammer and saw']])
|
|
|
|
def test_quoted_nl(self):
|
|
input = '''\
|
|
1,2,3,"""I see,""
|
|
said the blind man","as he picked up his
|
|
hammer and saw"
|
|
9,8,7,6'''
|
|
self.readerAssertEqual(input,
|
|
[['1', '2', '3',
|
|
'"I see,"\nsaid the blind man',
|
|
'as he picked up his\nhammer and saw'],
|
|
['9','8','7','6']])
|
|
|
|
def test_dubious_quote(self):
|
|
self.readerAssertEqual('12,12,1",', [['12', '12', '1"', '']])
|
|
|
|
def test_null(self):
|
|
self.writerAssertEqual([], '')
|
|
|
|
def test_single_writer(self):
|
|
self.writerAssertEqual([['abc']], 'abc\r\n')
|
|
|
|
def test_simple_writer(self):
|
|
self.writerAssertEqual([[1, 2, 'abc', 3, 4]], '1,2,abc,3,4\r\n')
|
|
|
|
def test_quotes(self):
|
|
self.writerAssertEqual([[1, 2, 'a"bc"', 3, 4]], '1,2,"a""bc""",3,4\r\n')
|
|
|
|
def test_quote_fieldsep(self):
|
|
self.writerAssertEqual([['abc,def']], '"abc,def"\r\n')
|
|
|
|
def test_newlines(self):
|
|
self.writerAssertEqual([[1, 2, 'a\nbc', 3, 4]], '1,2,"a\nbc",3,4\r\n')
|
|
|
|
class EscapedExcel(csv.excel):
|
|
quoting = csv.QUOTE_NONE
|
|
escapechar = '\\'
|
|
|
|
class TestEscapedExcel(TestCsvBase):
|
|
dialect = EscapedExcel()
|
|
|
|
def test_escape_fieldsep(self):
|
|
self.writerAssertEqual([['abc,def']], 'abc\\,def\r\n')
|
|
|
|
def test_read_escape_fieldsep(self):
|
|
self.readerAssertEqual('abc\\,def\r\n', [['abc,def']])
|
|
|
|
class TestDialectUnix(TestCsvBase):
|
|
dialect = 'unix'
|
|
|
|
def test_simple_writer(self):
|
|
self.writerAssertEqual([[1, 'abc def', 'abc']], '"1","abc def","abc"\n')
|
|
|
|
def test_simple_reader(self):
|
|
self.readerAssertEqual('"1","abc def","abc"\n', [['1', 'abc def', 'abc']])
|
|
|
|
class QuotedEscapedExcel(csv.excel):
|
|
quoting = csv.QUOTE_NONNUMERIC
|
|
escapechar = '\\'
|
|
|
|
class TestQuotedEscapedExcel(TestCsvBase):
|
|
dialect = QuotedEscapedExcel()
|
|
|
|
def test_write_escape_fieldsep(self):
|
|
self.writerAssertEqual([['abc,def']], '"abc,def"\r\n')
|
|
|
|
def test_read_escape_fieldsep(self):
|
|
self.readerAssertEqual('"abc\\,def"\r\n', [['abc,def']])
|
|
|
|
class TestDictFields(unittest.TestCase):
|
|
### "long" means the row is longer than the number of fieldnames
|
|
### "short" means there are fewer elements in the row than fieldnames
|
|
def test_writeheader_return_value(self):
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"])
|
|
writeheader_return_value = writer.writeheader()
|
|
self.assertEqual(writeheader_return_value, 10)
|
|
|
|
def test_write_simple_dict(self):
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"])
|
|
writer.writeheader()
|
|
fileobj.seek(0)
|
|
self.assertEqual(fileobj.readline(), "f1,f2,f3\r\n")
|
|
writer.writerow({"f1": 10, "f3": "abc"})
|
|
fileobj.seek(0)
|
|
fileobj.readline() # header
|
|
self.assertEqual(fileobj.read(), "10,,abc\r\n")
|
|
|
|
def test_write_multiple_dict_rows(self):
|
|
fileobj = StringIO()
|
|
writer = csv.DictWriter(fileobj, fieldnames=["f1", "f2", "f3"])
|
|
writer.writeheader()
|
|
self.assertEqual(fileobj.getvalue(), "f1,f2,f3\r\n")
|
|
writer.writerows([{"f1": 1, "f2": "abc", "f3": "f"},
|
|
{"f1": 2, "f2": 5, "f3": "xyz"}])
|
|
self.assertEqual(fileobj.getvalue(),
|
|
"f1,f2,f3\r\n1,abc,f\r\n2,5,xyz\r\n")
|
|
|
|
def test_write_no_fields(self):
|
|
fileobj = StringIO()
|
|
self.assertRaises(TypeError, csv.DictWriter, fileobj)
|
|
|
|
def test_write_fields_not_in_fieldnames(self):
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.DictWriter(fileobj, fieldnames = ["f1", "f2", "f3"])
|
|
# Of special note is the non-string key (issue 19449)
|
|
with self.assertRaises(ValueError) as cx:
|
|
writer.writerow({"f4": 10, "f2": "spam", 1: "abc"})
|
|
exception = str(cx.exception)
|
|
self.assertIn("fieldnames", exception)
|
|
self.assertIn("'f4'", exception)
|
|
self.assertNotIn("'f2'", exception)
|
|
self.assertIn("1", exception)
|
|
|
|
def test_typo_in_extrasaction_raises_error(self):
|
|
fileobj = StringIO()
|
|
self.assertRaises(ValueError, csv.DictWriter, fileobj, ['f1', 'f2'],
|
|
extrasaction="raised")
|
|
|
|
def test_write_field_not_in_field_names_raise(self):
|
|
fileobj = StringIO()
|
|
writer = csv.DictWriter(fileobj, ['f1', 'f2'], extrasaction="raise")
|
|
dictrow = {'f0': 0, 'f1': 1, 'f2': 2, 'f3': 3}
|
|
self.assertRaises(ValueError, csv.DictWriter.writerow, writer, dictrow)
|
|
|
|
# see bpo-44512 (differently cased 'raise' should not result in 'ignore')
|
|
writer = csv.DictWriter(fileobj, ['f1', 'f2'], extrasaction="RAISE")
|
|
self.assertRaises(ValueError, csv.DictWriter.writerow, writer, dictrow)
|
|
|
|
def test_write_field_not_in_field_names_ignore(self):
|
|
fileobj = StringIO()
|
|
writer = csv.DictWriter(fileobj, ['f1', 'f2'], extrasaction="ignore")
|
|
dictrow = {'f0': 0, 'f1': 1, 'f2': 2, 'f3': 3}
|
|
csv.DictWriter.writerow(writer, dictrow)
|
|
self.assertEqual(fileobj.getvalue(), "1,2\r\n")
|
|
|
|
# bpo-44512
|
|
writer = csv.DictWriter(fileobj, ['f1', 'f2'], extrasaction="IGNORE")
|
|
csv.DictWriter.writerow(writer, dictrow)
|
|
|
|
def test_dict_reader_fieldnames_accepts_iter(self):
|
|
fieldnames = ["a", "b", "c"]
|
|
f = StringIO()
|
|
reader = csv.DictReader(f, iter(fieldnames))
|
|
self.assertEqual(reader.fieldnames, fieldnames)
|
|
|
|
def test_dict_reader_fieldnames_accepts_list(self):
|
|
fieldnames = ["a", "b", "c"]
|
|
f = StringIO()
|
|
reader = csv.DictReader(f, fieldnames)
|
|
self.assertEqual(reader.fieldnames, fieldnames)
|
|
|
|
def test_dict_writer_fieldnames_rejects_iter(self):
|
|
fieldnames = ["a", "b", "c"]
|
|
f = StringIO()
|
|
writer = csv.DictWriter(f, iter(fieldnames))
|
|
self.assertEqual(writer.fieldnames, fieldnames)
|
|
|
|
def test_dict_writer_fieldnames_accepts_list(self):
|
|
fieldnames = ["a", "b", "c"]
|
|
f = StringIO()
|
|
writer = csv.DictWriter(f, fieldnames)
|
|
self.assertEqual(writer.fieldnames, fieldnames)
|
|
|
|
def test_dict_reader_fieldnames_is_optional(self):
|
|
f = StringIO()
|
|
reader = csv.DictReader(f, fieldnames=None)
|
|
|
|
def test_read_dict_fields(self):
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("1,2,abc\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.DictReader(fileobj,
|
|
fieldnames=["f1", "f2", "f3"])
|
|
self.assertEqual(next(reader), {"f1": '1', "f2": '2', "f3": 'abc'})
|
|
|
|
def test_read_dict_no_fieldnames(self):
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("f1,f2,f3\r\n1,2,abc\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.DictReader(fileobj)
|
|
self.assertEqual(next(reader), {"f1": '1', "f2": '2', "f3": 'abc'})
|
|
self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"])
|
|
|
|
# Two test cases to make sure existing ways of implicitly setting
|
|
# fieldnames continue to work. Both arise from discussion in issue3436.
|
|
def test_read_dict_fieldnames_from_file(self):
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("f1,f2,f3\r\n1,2,abc\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.DictReader(fileobj,
|
|
fieldnames=next(csv.reader(fileobj)))
|
|
self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"])
|
|
self.assertEqual(next(reader), {"f1": '1', "f2": '2', "f3": 'abc'})
|
|
|
|
def test_read_dict_fieldnames_chain(self):
|
|
import itertools
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("f1,f2,f3\r\n1,2,abc\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.DictReader(fileobj)
|
|
first = next(reader)
|
|
for row in itertools.chain([first], reader):
|
|
self.assertEqual(reader.fieldnames, ["f1", "f2", "f3"])
|
|
self.assertEqual(row, {"f1": '1', "f2": '2', "f3": 'abc'})
|
|
|
|
def test_read_long(self):
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("1,2,abc,4,5,6\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.DictReader(fileobj,
|
|
fieldnames=["f1", "f2"])
|
|
self.assertEqual(next(reader), {"f1": '1', "f2": '2',
|
|
None: ["abc", "4", "5", "6"]})
|
|
|
|
def test_read_long_with_rest(self):
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("1,2,abc,4,5,6\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.DictReader(fileobj,
|
|
fieldnames=["f1", "f2"], restkey="_rest")
|
|
self.assertEqual(next(reader), {"f1": '1', "f2": '2',
|
|
"_rest": ["abc", "4", "5", "6"]})
|
|
|
|
def test_read_long_with_rest_no_fieldnames(self):
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("f1,f2\r\n1,2,abc,4,5,6\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.DictReader(fileobj, restkey="_rest")
|
|
self.assertEqual(reader.fieldnames, ["f1", "f2"])
|
|
self.assertEqual(next(reader), {"f1": '1', "f2": '2',
|
|
"_rest": ["abc", "4", "5", "6"]})
|
|
|
|
def test_read_short(self):
|
|
with TemporaryFile("w+", encoding="utf-8") as fileobj:
|
|
fileobj.write("1,2,abc,4,5,6\r\n1,2,abc\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.DictReader(fileobj,
|
|
fieldnames="1 2 3 4 5 6".split(),
|
|
restval="DEFAULT")
|
|
self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
|
|
"4": '4', "5": '5', "6": '6'})
|
|
self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
|
|
"4": 'DEFAULT', "5": 'DEFAULT',
|
|
"6": 'DEFAULT'})
|
|
|
|
def test_read_multi(self):
|
|
sample = [
|
|
'2147483648,43.0e12,17,abc,def\r\n',
|
|
'147483648,43.0e2,17,abc,def\r\n',
|
|
'47483648,43.0,170,abc,def\r\n'
|
|
]
|
|
|
|
reader = csv.DictReader(sample,
|
|
fieldnames="i1 float i2 s1 s2".split())
|
|
self.assertEqual(next(reader), {"i1": '2147483648',
|
|
"float": '43.0e12',
|
|
"i2": '17',
|
|
"s1": 'abc',
|
|
"s2": 'def'})
|
|
|
|
def test_read_with_blanks(self):
|
|
reader = csv.DictReader(["1,2,abc,4,5,6\r\n","\r\n",
|
|
"1,2,abc,4,5,6\r\n"],
|
|
fieldnames="1 2 3 4 5 6".split())
|
|
self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
|
|
"4": '4', "5": '5', "6": '6'})
|
|
self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
|
|
"4": '4', "5": '5', "6": '6'})
|
|
|
|
def test_read_semi_sep(self):
|
|
reader = csv.DictReader(["1;2;abc;4;5;6\r\n"],
|
|
fieldnames="1 2 3 4 5 6".split(),
|
|
delimiter=';')
|
|
self.assertEqual(next(reader), {"1": '1', "2": '2', "3": 'abc',
|
|
"4": '4', "5": '5', "6": '6'})
|
|
|
|
class TestArrayWrites(unittest.TestCase):
|
|
def test_int_write(self):
|
|
import array
|
|
contents = [(20-i) for i in range(20)]
|
|
a = array.array('i', contents)
|
|
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.writer(fileobj, dialect="excel")
|
|
writer.writerow(a)
|
|
expected = ",".join([str(i) for i in a])+"\r\n"
|
|
fileobj.seek(0)
|
|
self.assertEqual(fileobj.read(), expected)
|
|
|
|
def test_double_write(self):
|
|
import array
|
|
contents = [(20-i)*0.1 for i in range(20)]
|
|
a = array.array('d', contents)
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.writer(fileobj, dialect="excel")
|
|
writer.writerow(a)
|
|
expected = ",".join([str(i) for i in a])+"\r\n"
|
|
fileobj.seek(0)
|
|
self.assertEqual(fileobj.read(), expected)
|
|
|
|
def test_float_write(self):
|
|
import array
|
|
contents = [(20-i)*0.1 for i in range(20)]
|
|
a = array.array('f', contents)
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.writer(fileobj, dialect="excel")
|
|
writer.writerow(a)
|
|
expected = ",".join([str(i) for i in a])+"\r\n"
|
|
fileobj.seek(0)
|
|
self.assertEqual(fileobj.read(), expected)
|
|
|
|
def test_char_write(self):
|
|
import array, string
|
|
a = array.array('w', string.ascii_letters)
|
|
|
|
with TemporaryFile("w+", encoding="utf-8", newline='') as fileobj:
|
|
writer = csv.writer(fileobj, dialect="excel")
|
|
writer.writerow(a)
|
|
expected = ",".join(a)+"\r\n"
|
|
fileobj.seek(0)
|
|
self.assertEqual(fileobj.read(), expected)
|
|
|
|
class TestDialectValidity(unittest.TestCase):
|
|
def test_quoting(self):
|
|
class mydialect(csv.Dialect):
|
|
delimiter = ";"
|
|
escapechar = '\\'
|
|
doublequote = False
|
|
skipinitialspace = True
|
|
lineterminator = '\r\n'
|
|
quoting = csv.QUOTE_NONE
|
|
d = mydialect()
|
|
self.assertEqual(d.quoting, csv.QUOTE_NONE)
|
|
|
|
mydialect.quoting = None
|
|
self.assertRaises(csv.Error, mydialect)
|
|
|
|
mydialect.quoting = 42
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'bad "quoting" value')
|
|
|
|
mydialect.doublequote = True
|
|
mydialect.quoting = csv.QUOTE_ALL
|
|
mydialect.quotechar = '"'
|
|
d = mydialect()
|
|
self.assertEqual(d.quoting, csv.QUOTE_ALL)
|
|
self.assertEqual(d.quotechar, '"')
|
|
self.assertTrue(d.doublequote)
|
|
|
|
mydialect.quotechar = ""
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"quotechar" must be a 1-character string')
|
|
|
|
mydialect.quotechar = "''"
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"quotechar" must be a 1-character string')
|
|
|
|
mydialect.quotechar = 4
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"quotechar" must be string or None, not int')
|
|
|
|
def test_delimiter(self):
|
|
class mydialect(csv.Dialect):
|
|
delimiter = ";"
|
|
escapechar = '\\'
|
|
doublequote = False
|
|
skipinitialspace = True
|
|
lineterminator = '\r\n'
|
|
quoting = csv.QUOTE_NONE
|
|
d = mydialect()
|
|
self.assertEqual(d.delimiter, ";")
|
|
|
|
mydialect.delimiter = ":::"
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"delimiter" must be a 1-character string')
|
|
|
|
mydialect.delimiter = ""
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"delimiter" must be a 1-character string')
|
|
|
|
mydialect.delimiter = b","
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"delimiter" must be string, not bytes')
|
|
|
|
mydialect.delimiter = 4
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"delimiter" must be string, not int')
|
|
|
|
mydialect.delimiter = None
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"delimiter" must be string, not NoneType')
|
|
|
|
def test_escapechar(self):
|
|
class mydialect(csv.Dialect):
|
|
delimiter = ";"
|
|
escapechar = '\\'
|
|
doublequote = False
|
|
skipinitialspace = True
|
|
lineterminator = '\r\n'
|
|
quoting = csv.QUOTE_NONE
|
|
d = mydialect()
|
|
self.assertEqual(d.escapechar, "\\")
|
|
|
|
mydialect.escapechar = ""
|
|
with self.assertRaisesRegex(csv.Error, '"escapechar" must be a 1-character string'):
|
|
mydialect()
|
|
|
|
mydialect.escapechar = "**"
|
|
with self.assertRaisesRegex(csv.Error, '"escapechar" must be a 1-character string'):
|
|
mydialect()
|
|
|
|
mydialect.escapechar = b"*"
|
|
with self.assertRaisesRegex(csv.Error, '"escapechar" must be string or None, not bytes'):
|
|
mydialect()
|
|
|
|
mydialect.escapechar = 4
|
|
with self.assertRaisesRegex(csv.Error, '"escapechar" must be string or None, not int'):
|
|
mydialect()
|
|
|
|
def test_lineterminator(self):
|
|
class mydialect(csv.Dialect):
|
|
delimiter = ";"
|
|
escapechar = '\\'
|
|
doublequote = False
|
|
skipinitialspace = True
|
|
lineterminator = '\r\n'
|
|
quoting = csv.QUOTE_NONE
|
|
d = mydialect()
|
|
self.assertEqual(d.lineterminator, '\r\n')
|
|
|
|
mydialect.lineterminator = ":::"
|
|
d = mydialect()
|
|
self.assertEqual(d.lineterminator, ":::")
|
|
|
|
mydialect.lineterminator = 4
|
|
with self.assertRaises(csv.Error) as cm:
|
|
mydialect()
|
|
self.assertEqual(str(cm.exception),
|
|
'"lineterminator" must be a string')
|
|
|
|
def test_invalid_chars(self):
|
|
def create_invalid(field_name, value, **kwargs):
|
|
class mydialect(csv.Dialect):
|
|
delimiter = ','
|
|
quoting = csv.QUOTE_ALL
|
|
quotechar = '"'
|
|
lineterminator = '\r\n'
|
|
setattr(mydialect, field_name, value)
|
|
for field_name, value in kwargs.items():
|
|
setattr(mydialect, field_name, value)
|
|
d = mydialect()
|
|
|
|
for field_name in ("delimiter", "escapechar", "quotechar"):
|
|
with self.subTest(field_name=field_name):
|
|
self.assertRaises(csv.Error, create_invalid, field_name, "")
|
|
self.assertRaises(csv.Error, create_invalid, field_name, "abc")
|
|
self.assertRaises(csv.Error, create_invalid, field_name, b'x')
|
|
self.assertRaises(csv.Error, create_invalid, field_name, 5)
|
|
self.assertRaises(ValueError, create_invalid, field_name, "\n")
|
|
self.assertRaises(ValueError, create_invalid, field_name, "\r")
|
|
if field_name != "delimiter":
|
|
self.assertRaises(ValueError, create_invalid, field_name, " ",
|
|
skipinitialspace=True)
|
|
|
|
|
|
class TestSniffer(unittest.TestCase):
|
|
sample1 = """\
|
|
Harry's, Arlington Heights, IL, 2/1/03, Kimi Hayes
|
|
Shark City, Glendale Heights, IL, 12/28/02, Prezence
|
|
Tommy's Place, Blue Island, IL, 12/28/02, Blue Sunday/White Crow
|
|
Stonecutters Seafood and Chop House, Lemont, IL, 12/19/02, Week Back
|
|
"""
|
|
sample2 = """\
|
|
'Harry''s':'Arlington Heights':'IL':'2/1/03':'Kimi Hayes'
|
|
'Shark City':'Glendale Heights':'IL':'12/28/02':'Prezence'
|
|
'Tommy''s Place':'Blue Island':'IL':'12/28/02':'Blue Sunday/White Crow'
|
|
'Stonecutters ''Seafood'' and Chop House':'Lemont':'IL':'12/19/02':'Week Back'
|
|
"""
|
|
header1 = '''\
|
|
"venue","city","state","date","performers"
|
|
'''
|
|
sample3 = '''\
|
|
05/05/03?05/05/03?05/05/03?05/05/03?05/05/03?05/05/03
|
|
05/05/03?05/05/03?05/05/03?05/05/03?05/05/03?05/05/03
|
|
05/05/03?05/05/03?05/05/03?05/05/03?05/05/03?05/05/03
|
|
'''
|
|
|
|
sample4 = '''\
|
|
2147483648;43.0e12;17;abc;def
|
|
147483648;43.0e2;17;abc;def
|
|
47483648;43.0;170;abc;def
|
|
'''
|
|
|
|
sample5 = "aaa\tbbb\r\nAAA\t\r\nBBB\t\r\n"
|
|
sample6 = "a|b|c\r\nd|e|f\r\n"
|
|
sample7 = "'a'|'b'|'c'\r\n'd'|e|f\r\n"
|
|
|
|
# Issue 18155: Use a delimiter that is a special char to regex:
|
|
|
|
header2 = '''\
|
|
"venue"+"city"+"state"+"date"+"performers"
|
|
'''
|
|
sample8 = """\
|
|
Harry's+ Arlington Heights+ IL+ 2/1/03+ Kimi Hayes
|
|
Shark City+ Glendale Heights+ IL+ 12/28/02+ Prezence
|
|
Tommy's Place+ Blue Island+ IL+ 12/28/02+ Blue Sunday/White Crow
|
|
Stonecutters Seafood and Chop House+ Lemont+ IL+ 12/19/02+ Week Back
|
|
"""
|
|
sample9 = """\
|
|
'Harry''s'+ Arlington Heights'+ 'IL'+ '2/1/03'+ 'Kimi Hayes'
|
|
'Shark City'+ Glendale Heights'+' IL'+ '12/28/02'+ 'Prezence'
|
|
'Tommy''s Place'+ Blue Island'+ 'IL'+ '12/28/02'+ 'Blue Sunday/White Crow'
|
|
'Stonecutters ''Seafood'' and Chop House'+ 'Lemont'+ 'IL'+ '12/19/02'+ 'Week Back'
|
|
"""
|
|
|
|
sample10 = dedent("""
|
|
abc,def
|
|
ghijkl,mno
|
|
ghi,jkl
|
|
""")
|
|
|
|
sample11 = dedent("""
|
|
abc,def
|
|
ghijkl,mnop
|
|
ghi,jkl
|
|
""")
|
|
|
|
sample12 = dedent(""""time","forces"
|
|
1,1.5
|
|
0.5,5+0j
|
|
0,0
|
|
1+1j,6
|
|
""")
|
|
|
|
sample13 = dedent(""""time","forces"
|
|
0,0
|
|
1,2
|
|
a,b
|
|
""")
|
|
|
|
sample14 = """\
|
|
abc\0def
|
|
ghijkl\0mno
|
|
ghi\0jkl
|
|
"""
|
|
|
|
def test_issue43625(self):
|
|
sniffer = csv.Sniffer()
|
|
self.assertTrue(sniffer.has_header(self.sample12))
|
|
self.assertFalse(sniffer.has_header(self.sample13))
|
|
|
|
def test_has_header_strings(self):
|
|
"More to document existing (unexpected?) behavior than anything else."
|
|
sniffer = csv.Sniffer()
|
|
self.assertFalse(sniffer.has_header(self.sample10))
|
|
self.assertFalse(sniffer.has_header(self.sample11))
|
|
|
|
def test_has_header(self):
|
|
sniffer = csv.Sniffer()
|
|
self.assertIs(sniffer.has_header(self.sample1), False)
|
|
self.assertIs(sniffer.has_header(self.header1 + self.sample1), True)
|
|
|
|
def test_has_header_regex_special_delimiter(self):
|
|
sniffer = csv.Sniffer()
|
|
self.assertIs(sniffer.has_header(self.sample8), False)
|
|
self.assertIs(sniffer.has_header(self.header2 + self.sample8), True)
|
|
|
|
def test_guess_quote_and_delimiter(self):
|
|
sniffer = csv.Sniffer()
|
|
for header in (";'123;4';", "'123;4';", ";'123;4'", "'123;4'"):
|
|
with self.subTest(header):
|
|
dialect = sniffer.sniff(header, ",;")
|
|
self.assertEqual(dialect.delimiter, ';')
|
|
self.assertEqual(dialect.quotechar, "'")
|
|
self.assertIs(dialect.doublequote, False)
|
|
self.assertIs(dialect.skipinitialspace, False)
|
|
|
|
def test_sniff(self):
|
|
sniffer = csv.Sniffer()
|
|
dialect = sniffer.sniff(self.sample1)
|
|
self.assertEqual(dialect.delimiter, ",")
|
|
self.assertEqual(dialect.quotechar, '"')
|
|
self.assertIs(dialect.skipinitialspace, True)
|
|
|
|
dialect = sniffer.sniff(self.sample2)
|
|
self.assertEqual(dialect.delimiter, ":")
|
|
self.assertEqual(dialect.quotechar, "'")
|
|
self.assertIs(dialect.skipinitialspace, False)
|
|
|
|
def test_delimiters(self):
|
|
sniffer = csv.Sniffer()
|
|
dialect = sniffer.sniff(self.sample3)
|
|
# given that all three lines in sample3 are equal,
|
|
# I think that any character could have been 'guessed' as the
|
|
# delimiter, depending on dictionary order
|
|
self.assertIn(dialect.delimiter, self.sample3)
|
|
dialect = sniffer.sniff(self.sample3, delimiters="?,")
|
|
self.assertEqual(dialect.delimiter, "?")
|
|
dialect = sniffer.sniff(self.sample3, delimiters="/,")
|
|
self.assertEqual(dialect.delimiter, "/")
|
|
dialect = sniffer.sniff(self.sample4)
|
|
self.assertEqual(dialect.delimiter, ";")
|
|
dialect = sniffer.sniff(self.sample5)
|
|
self.assertEqual(dialect.delimiter, "\t")
|
|
dialect = sniffer.sniff(self.sample6)
|
|
self.assertEqual(dialect.delimiter, "|")
|
|
dialect = sniffer.sniff(self.sample7)
|
|
self.assertEqual(dialect.delimiter, "|")
|
|
self.assertEqual(dialect.quotechar, "'")
|
|
dialect = sniffer.sniff(self.sample8)
|
|
self.assertEqual(dialect.delimiter, '+')
|
|
dialect = sniffer.sniff(self.sample9)
|
|
self.assertEqual(dialect.delimiter, '+')
|
|
self.assertEqual(dialect.quotechar, "'")
|
|
dialect = sniffer.sniff(self.sample14)
|
|
self.assertEqual(dialect.delimiter, '\0')
|
|
|
|
def test_doublequote(self):
|
|
sniffer = csv.Sniffer()
|
|
dialect = sniffer.sniff(self.header1)
|
|
self.assertFalse(dialect.doublequote)
|
|
dialect = sniffer.sniff(self.header2)
|
|
self.assertFalse(dialect.doublequote)
|
|
dialect = sniffer.sniff(self.sample2)
|
|
self.assertTrue(dialect.doublequote)
|
|
dialect = sniffer.sniff(self.sample8)
|
|
self.assertFalse(dialect.doublequote)
|
|
dialect = sniffer.sniff(self.sample9)
|
|
self.assertTrue(dialect.doublequote)
|
|
|
|
class NUL:
|
|
def write(s, *args):
|
|
pass
|
|
writelines = write
|
|
|
|
@unittest.skipUnless(hasattr(sys, "gettotalrefcount"),
|
|
'requires sys.gettotalrefcount()')
|
|
class TestLeaks(unittest.TestCase):
|
|
def test_create_read(self):
|
|
delta = 0
|
|
lastrc = sys.gettotalrefcount()
|
|
for i in range(20):
|
|
gc.collect()
|
|
self.assertEqual(gc.garbage, [])
|
|
rc = sys.gettotalrefcount()
|
|
csv.reader(["a,b,c\r\n"])
|
|
csv.reader(["a,b,c\r\n"])
|
|
csv.reader(["a,b,c\r\n"])
|
|
delta = rc-lastrc
|
|
lastrc = rc
|
|
# if csv.reader() leaks, last delta should be 3 or more
|
|
self.assertLess(delta, 3)
|
|
|
|
def test_create_write(self):
|
|
delta = 0
|
|
lastrc = sys.gettotalrefcount()
|
|
s = NUL()
|
|
for i in range(20):
|
|
gc.collect()
|
|
self.assertEqual(gc.garbage, [])
|
|
rc = sys.gettotalrefcount()
|
|
csv.writer(s)
|
|
csv.writer(s)
|
|
csv.writer(s)
|
|
delta = rc-lastrc
|
|
lastrc = rc
|
|
# if csv.writer() leaks, last delta should be 3 or more
|
|
self.assertLess(delta, 3)
|
|
|
|
def test_read(self):
|
|
delta = 0
|
|
rows = ["a,b,c\r\n"]*5
|
|
lastrc = sys.gettotalrefcount()
|
|
for i in range(20):
|
|
gc.collect()
|
|
self.assertEqual(gc.garbage, [])
|
|
rc = sys.gettotalrefcount()
|
|
rdr = csv.reader(rows)
|
|
for row in rdr:
|
|
pass
|
|
delta = rc-lastrc
|
|
lastrc = rc
|
|
# if reader leaks during read, delta should be 5 or more
|
|
self.assertLess(delta, 5)
|
|
|
|
def test_write(self):
|
|
delta = 0
|
|
rows = [[1,2,3]]*5
|
|
s = NUL()
|
|
lastrc = sys.gettotalrefcount()
|
|
for i in range(20):
|
|
gc.collect()
|
|
self.assertEqual(gc.garbage, [])
|
|
rc = sys.gettotalrefcount()
|
|
writer = csv.writer(s)
|
|
for row in rows:
|
|
writer.writerow(row)
|
|
delta = rc-lastrc
|
|
lastrc = rc
|
|
# if writer leaks during write, last delta should be 5 or more
|
|
self.assertLess(delta, 5)
|
|
|
|
class TestUnicode(unittest.TestCase):
|
|
|
|
names = ["Martin von Löwis",
|
|
"Marc André Lemburg",
|
|
"Guido van Rossum",
|
|
"François Pinard"]
|
|
|
|
def test_unicode_read(self):
|
|
with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj:
|
|
fileobj.write(",".join(self.names) + "\r\n")
|
|
fileobj.seek(0)
|
|
reader = csv.reader(fileobj)
|
|
self.assertEqual(list(reader), [self.names])
|
|
|
|
|
|
def test_unicode_write(self):
|
|
with TemporaryFile("w+", newline='', encoding="utf-8") as fileobj:
|
|
writer = csv.writer(fileobj)
|
|
writer.writerow(self.names)
|
|
expected = ",".join(self.names)+"\r\n"
|
|
fileobj.seek(0)
|
|
self.assertEqual(fileobj.read(), expected)
|
|
|
|
class KeyOrderingTest(unittest.TestCase):
|
|
|
|
def test_ordering_for_the_dict_reader_and_writer(self):
|
|
resultset = set()
|
|
for keys in permutations("abcde"):
|
|
with TemporaryFile('w+', newline='', encoding="utf-8") as fileobject:
|
|
dw = csv.DictWriter(fileobject, keys)
|
|
dw.writeheader()
|
|
fileobject.seek(0)
|
|
dr = csv.DictReader(fileobject)
|
|
kt = tuple(dr.fieldnames)
|
|
self.assertEqual(keys, kt)
|
|
resultset.add(kt)
|
|
# Final sanity check: were all permutations unique?
|
|
self.assertEqual(len(resultset), 120, "Key ordering: some key permutations not collected (expected 120)")
|
|
|
|
def test_ordered_dict_reader(self):
|
|
data = dedent('''\
|
|
FirstName,LastName
|
|
Eric,Idle
|
|
Graham,Chapman,Over1,Over2
|
|
|
|
Under1
|
|
John,Cleese
|
|
''').splitlines()
|
|
|
|
self.assertEqual(list(csv.DictReader(data)),
|
|
[OrderedDict([('FirstName', 'Eric'), ('LastName', 'Idle')]),
|
|
OrderedDict([('FirstName', 'Graham'), ('LastName', 'Chapman'),
|
|
(None, ['Over1', 'Over2'])]),
|
|
OrderedDict([('FirstName', 'Under1'), ('LastName', None)]),
|
|
OrderedDict([('FirstName', 'John'), ('LastName', 'Cleese')]),
|
|
])
|
|
|
|
self.assertEqual(list(csv.DictReader(data, restkey='OtherInfo')),
|
|
[OrderedDict([('FirstName', 'Eric'), ('LastName', 'Idle')]),
|
|
OrderedDict([('FirstName', 'Graham'), ('LastName', 'Chapman'),
|
|
('OtherInfo', ['Over1', 'Over2'])]),
|
|
OrderedDict([('FirstName', 'Under1'), ('LastName', None)]),
|
|
OrderedDict([('FirstName', 'John'), ('LastName', 'Cleese')]),
|
|
])
|
|
|
|
del data[0] # Remove the header row
|
|
self.assertEqual(list(csv.DictReader(data, fieldnames=['fname', 'lname'])),
|
|
[OrderedDict([('fname', 'Eric'), ('lname', 'Idle')]),
|
|
OrderedDict([('fname', 'Graham'), ('lname', 'Chapman'),
|
|
(None, ['Over1', 'Over2'])]),
|
|
OrderedDict([('fname', 'Under1'), ('lname', None)]),
|
|
OrderedDict([('fname', 'John'), ('lname', 'Cleese')]),
|
|
])
|
|
|
|
|
|
class MiscTestCase(unittest.TestCase):
|
|
def test__all__(self):
|
|
support.check__all__(self, csv, ('csv', '_csv'))
|
|
|
|
def test_subclassable(self):
|
|
# issue 44089
|
|
class Foo(csv.Error): ...
|
|
|
|
@support.cpython_only
|
|
def test_disallow_instantiation(self):
|
|
_csv = import_helper.import_module("_csv")
|
|
for tp in _csv.Reader, _csv.Writer:
|
|
with self.subTest(tp=tp):
|
|
check_disallow_instantiation(self, tp)
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|