513 lines
14 KiB
Python
513 lines
14 KiB
Python
|
|
"""Doctest for method/function calls.
|
|
|
|
We're going the use these types for extra testing
|
|
|
|
>>> from collections import UserList
|
|
>>> from collections import UserDict
|
|
|
|
We're defining four helper functions
|
|
|
|
>>> def e(a,b):
|
|
... print(a, b)
|
|
|
|
>>> def f(*a, **k):
|
|
... print(a, support.sortdict(k))
|
|
|
|
>>> def g(x, *y, **z):
|
|
... print(x, y, support.sortdict(z))
|
|
|
|
>>> def h(j=1, a=2, h=3):
|
|
... print(j, a, h)
|
|
|
|
Argument list examples
|
|
|
|
>>> f()
|
|
() {}
|
|
>>> f(1)
|
|
(1,) {}
|
|
>>> f(1, 2)
|
|
(1, 2) {}
|
|
>>> f(1, 2, 3)
|
|
(1, 2, 3) {}
|
|
>>> f(1, 2, 3, *(4, 5))
|
|
(1, 2, 3, 4, 5) {}
|
|
>>> f(1, 2, 3, *[4, 5])
|
|
(1, 2, 3, 4, 5) {}
|
|
>>> f(*[1, 2, 3], 4, 5)
|
|
(1, 2, 3, 4, 5) {}
|
|
>>> f(1, 2, 3, *UserList([4, 5]))
|
|
(1, 2, 3, 4, 5) {}
|
|
>>> f(1, 2, 3, *[4, 5], *[6, 7])
|
|
(1, 2, 3, 4, 5, 6, 7) {}
|
|
>>> f(1, *[2, 3], 4, *[5, 6], 7)
|
|
(1, 2, 3, 4, 5, 6, 7) {}
|
|
>>> f(*UserList([1, 2]), *UserList([3, 4]), 5, *UserList([6, 7]))
|
|
(1, 2, 3, 4, 5, 6, 7) {}
|
|
|
|
Here we add keyword arguments
|
|
|
|
>>> f(1, 2, 3, **{'a':4, 'b':5})
|
|
(1, 2, 3) {'a': 4, 'b': 5}
|
|
>>> f(1, 2, **{'a': -1, 'b': 5}, **{'a': 4, 'c': 6})
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() got multiple values for keyword argument 'a'
|
|
>>> f(1, 2, **{'a': -1, 'b': 5}, a=4, c=6)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() got multiple values for keyword argument 'a'
|
|
>>> f(1, 2, a=3, **{'a': 4}, **{'a': 5})
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() got multiple values for keyword argument 'a'
|
|
>>> f(1, 2, 3, *[4, 5], **{'a':6, 'b':7})
|
|
(1, 2, 3, 4, 5) {'a': 6, 'b': 7}
|
|
>>> f(1, 2, 3, x=4, y=5, *(6, 7), **{'a':8, 'b': 9})
|
|
(1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
|
|
>>> f(1, 2, 3, *[4, 5], **{'c': 8}, **{'a':6, 'b':7})
|
|
(1, 2, 3, 4, 5) {'a': 6, 'b': 7, 'c': 8}
|
|
>>> f(1, 2, 3, *(4, 5), x=6, y=7, **{'a':8, 'b': 9})
|
|
(1, 2, 3, 4, 5) {'a': 8, 'b': 9, 'x': 6, 'y': 7}
|
|
|
|
>>> f(1, 2, 3, **UserDict(a=4, b=5))
|
|
(1, 2, 3) {'a': 4, 'b': 5}
|
|
>>> f(1, 2, 3, *(4, 5), **UserDict(a=6, b=7))
|
|
(1, 2, 3, 4, 5) {'a': 6, 'b': 7}
|
|
>>> f(1, 2, 3, x=4, y=5, *(6, 7), **UserDict(a=8, b=9))
|
|
(1, 2, 3, 6, 7) {'a': 8, 'b': 9, 'x': 4, 'y': 5}
|
|
>>> f(1, 2, 3, *(4, 5), x=6, y=7, **UserDict(a=8, b=9))
|
|
(1, 2, 3, 4, 5) {'a': 8, 'b': 9, 'x': 6, 'y': 7}
|
|
|
|
Examples with invalid arguments (TypeErrors). We're also testing the function
|
|
names in the exception messages.
|
|
|
|
Verify clearing of SF bug #733667
|
|
|
|
>>> e(c=4)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: e() got an unexpected keyword argument 'c'
|
|
|
|
>>> g()
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() missing 1 required positional argument: 'x'
|
|
|
|
>>> g(*())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() missing 1 required positional argument: 'x'
|
|
|
|
>>> g(*(), **{})
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() missing 1 required positional argument: 'x'
|
|
|
|
>>> g(1)
|
|
1 () {}
|
|
>>> g(1, 2)
|
|
1 (2,) {}
|
|
>>> g(1, 2, 3)
|
|
1 (2, 3) {}
|
|
>>> g(1, 2, 3, *(4, 5))
|
|
1 (2, 3, 4, 5) {}
|
|
|
|
>>> class Nothing: pass
|
|
...
|
|
>>> g(*Nothing())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() argument after * must be an iterable, not Nothing
|
|
|
|
>>> class Nothing:
|
|
... def __len__(self): return 5
|
|
...
|
|
|
|
>>> g(*Nothing())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() argument after * must be an iterable, not Nothing
|
|
|
|
>>> class Nothing():
|
|
... def __len__(self): return 5
|
|
... def __getitem__(self, i):
|
|
... if i<3: return i
|
|
... else: raise IndexError(i)
|
|
...
|
|
|
|
>>> g(*Nothing())
|
|
0 (1, 2) {}
|
|
|
|
>>> class Nothing:
|
|
... def __init__(self): self.c = 0
|
|
... def __iter__(self): return self
|
|
... def __next__(self):
|
|
... if self.c == 4:
|
|
... raise StopIteration
|
|
... c = self.c
|
|
... self.c += 1
|
|
... return c
|
|
...
|
|
|
|
>>> g(*Nothing())
|
|
0 (1, 2, 3) {}
|
|
|
|
Check for issue #4806: Does a TypeError in a generator get propagated with the
|
|
right error message? (Also check with other iterables.)
|
|
|
|
>>> def broken(): raise TypeError("myerror")
|
|
...
|
|
|
|
>>> g(*(broken() for i in range(1)))
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: myerror
|
|
>>> g(*range(1), *(broken() for i in range(1)))
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: myerror
|
|
|
|
>>> class BrokenIterable1:
|
|
... def __iter__(self):
|
|
... raise TypeError('myerror')
|
|
...
|
|
>>> g(*BrokenIterable1())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: myerror
|
|
>>> g(*range(1), *BrokenIterable1())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: myerror
|
|
|
|
>>> class BrokenIterable2:
|
|
... def __iter__(self):
|
|
... yield 0
|
|
... raise TypeError('myerror')
|
|
...
|
|
>>> g(*BrokenIterable2())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: myerror
|
|
>>> g(*range(1), *BrokenIterable2())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: myerror
|
|
|
|
>>> class BrokenSequence:
|
|
... def __getitem__(self, idx):
|
|
... raise TypeError('myerror')
|
|
...
|
|
>>> g(*BrokenSequence())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: myerror
|
|
>>> g(*range(1), *BrokenSequence())
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: myerror
|
|
|
|
Make sure that the function doesn't stomp the dictionary
|
|
|
|
>>> d = {'a': 1, 'b': 2, 'c': 3}
|
|
>>> d2 = d.copy()
|
|
>>> g(1, d=4, **d)
|
|
1 () {'a': 1, 'b': 2, 'c': 3, 'd': 4}
|
|
>>> d == d2
|
|
True
|
|
|
|
What about willful misconduct?
|
|
|
|
>>> def saboteur(**kw):
|
|
... kw['x'] = 'm'
|
|
... return kw
|
|
|
|
>>> d = {}
|
|
>>> kw = saboteur(a=1, **d)
|
|
>>> d
|
|
{}
|
|
|
|
|
|
>>> g(1, 2, 3, **{'x': 4, 'y': 5})
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() got multiple values for argument 'x'
|
|
|
|
>>> f(**{1:2})
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: keywords must be strings
|
|
|
|
>>> h(**{'e': 2})
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() got an unexpected keyword argument 'e'
|
|
|
|
>>> h(*h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after * must be an iterable, not function
|
|
|
|
>>> h(1, *h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after * must be an iterable, not function
|
|
|
|
>>> h(*[1], *h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after * must be an iterable, not function
|
|
|
|
>>> dir(*h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: dir() argument after * must be an iterable, not function
|
|
|
|
>>> nothing = None
|
|
>>> nothing(*h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: NoneType object argument after * must be an iterable, \
|
|
not function
|
|
|
|
>>> h(**h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after ** must be a mapping, not function
|
|
|
|
>>> h(**[])
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after ** must be a mapping, not list
|
|
|
|
>>> h(a=1, **h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after ** must be a mapping, not function
|
|
|
|
>>> h(a=1, **[])
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after ** must be a mapping, not list
|
|
|
|
>>> h(**{'a': 1}, **h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after ** must be a mapping, not function
|
|
|
|
>>> h(**{'a': 1}, **[])
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: h() argument after ** must be a mapping, not list
|
|
|
|
>>> dir(**h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: dir() argument after ** must be a mapping, not function
|
|
|
|
>>> nothing(**h)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: NoneType object argument after ** must be a mapping, \
|
|
not function
|
|
|
|
>>> dir(b=1, **{'b': 1})
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: dir() got multiple values for keyword argument 'b'
|
|
|
|
Test a kwargs mapping with duplicated keys.
|
|
|
|
>>> from collections.abc import Mapping
|
|
>>> class MultiDict(Mapping):
|
|
... def __init__(self, items):
|
|
... self._items = items
|
|
...
|
|
... def __iter__(self):
|
|
... return (k for k, v in self._items)
|
|
...
|
|
... def __getitem__(self, key):
|
|
... for k, v in self._items:
|
|
... if k == key:
|
|
... return v
|
|
... raise KeyError(key)
|
|
...
|
|
... def __len__(self):
|
|
... return len(self._items)
|
|
...
|
|
... def keys(self):
|
|
... return [k for k, v in self._items]
|
|
...
|
|
... def values(self):
|
|
... return [v for k, v in self._items]
|
|
...
|
|
... def items(self):
|
|
... return [(k, v) for k, v in self._items]
|
|
...
|
|
>>> g(**MultiDict([('x', 1), ('y', 2)]))
|
|
1 () {'y': 2}
|
|
|
|
>>> g(**MultiDict([('x', 1), ('x', 2)]))
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() got multiple values for keyword argument 'x'
|
|
|
|
>>> g(a=3, **MultiDict([('x', 1), ('x', 2)]))
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() got multiple values for keyword argument 'x'
|
|
|
|
>>> g(**MultiDict([('a', 3)]), **MultiDict([('x', 1), ('x', 2)]))
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: g() got multiple values for keyword argument 'x'
|
|
|
|
Another helper function
|
|
|
|
>>> def f2(*a, **b):
|
|
... return a, b
|
|
|
|
|
|
>>> d = {}
|
|
>>> for i in range(512):
|
|
... key = 'k%d' % i
|
|
... d[key] = i
|
|
>>> a, b = f2(1, *(2,3), **d)
|
|
>>> len(a), len(b), b == d
|
|
(3, 512, True)
|
|
|
|
>>> class Foo:
|
|
... def method(self, arg1, arg2):
|
|
... return arg1+arg2
|
|
|
|
>>> x = Foo()
|
|
>>> Foo.method(*(x, 1, 2))
|
|
3
|
|
>>> Foo.method(x, *(1, 2))
|
|
3
|
|
>>> Foo.method(*(1, 2, 3))
|
|
5
|
|
>>> Foo.method(1, *[2, 3])
|
|
5
|
|
|
|
A PyCFunction that takes only positional parameters should allow an
|
|
empty keyword dictionary to pass without a complaint, but raise a
|
|
TypeError if te dictionary is not empty
|
|
|
|
>>> try:
|
|
... silence = id(1, *{})
|
|
... True
|
|
... except:
|
|
... False
|
|
True
|
|
|
|
>>> id(1, **{'foo': 1})
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: id() takes no keyword arguments
|
|
|
|
A corner case of keyword dictionary items being deleted during
|
|
the function call setup. See <http://bugs.python.org/issue2016>.
|
|
|
|
>>> class Name(str):
|
|
... def __eq__(self, other):
|
|
... try:
|
|
... del x[self]
|
|
... except KeyError:
|
|
... pass
|
|
... return str.__eq__(self, other)
|
|
... def __hash__(self):
|
|
... return str.__hash__(self)
|
|
|
|
>>> x = {Name("a"):1, Name("b"):2}
|
|
>>> def f(a, b):
|
|
... print(a,b)
|
|
>>> f(**x)
|
|
1 2
|
|
|
|
Too many arguments:
|
|
|
|
>>> def f(): pass
|
|
>>> f(1)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() takes 0 positional arguments but 1 was given
|
|
>>> def f(a): pass
|
|
>>> f(1, 2)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() takes 1 positional argument but 2 were given
|
|
>>> def f(a, b=1): pass
|
|
>>> f(1, 2, 3)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() takes from 1 to 2 positional arguments but 3 were given
|
|
>>> def f(*, kw): pass
|
|
>>> f(1, kw=3)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() takes 0 positional arguments but 1 positional argument (and 1 keyword-only argument) were given
|
|
>>> def f(*, kw, b): pass
|
|
>>> f(1, 2, 3, b=3, kw=3)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() takes 0 positional arguments but 3 positional arguments (and 2 keyword-only arguments) were given
|
|
>>> def f(a, b=2, *, kw): pass
|
|
>>> f(2, 3, 4, kw=4)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() takes from 1 to 2 positional arguments but 3 positional arguments (and 1 keyword-only argument) were given
|
|
|
|
Too few and missing arguments:
|
|
|
|
>>> def f(a): pass
|
|
>>> f()
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() missing 1 required positional argument: 'a'
|
|
>>> def f(a, b): pass
|
|
>>> f()
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() missing 2 required positional arguments: 'a' and 'b'
|
|
>>> def f(a, b, c): pass
|
|
>>> f()
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() missing 3 required positional arguments: 'a', 'b', and 'c'
|
|
>>> def f(a, b, c, d, e): pass
|
|
>>> f()
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() missing 5 required positional arguments: 'a', 'b', 'c', 'd', and 'e'
|
|
>>> def f(a, b=4, c=5, d=5): pass
|
|
>>> f(c=12, b=9)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() missing 1 required positional argument: 'a'
|
|
|
|
Same with keyword only args:
|
|
|
|
>>> def f(*, w): pass
|
|
>>> f()
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() missing 1 required keyword-only argument: 'w'
|
|
>>> def f(*, a, b, c, d, e): pass
|
|
>>> f()
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() missing 5 required keyword-only arguments: 'a', 'b', 'c', 'd', and 'e'
|
|
|
|
"""
|
|
|
|
import sys
|
|
from test import support
|
|
|
|
def test_main():
|
|
support.run_doctest(sys.modules[__name__], True)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|