Revert "Remove unused imports in tests (GH-14518) (GH-14522)" (GH-14555)

This reverts commit e34b5f4d64.

Lib/test/libregrtest/main.py

@@ -587,6 +587,7 @@ class Regrtest:
 
     def cleanup(self):
         import glob
+        import shutil
 
         path = os.path.join(self.tmp_dir, 'test_python_*')
         print("Cleanup %s directory" % self.tmp_dir)

Lib/test/support/__init__.py

@@ -5,6 +5,7 @@ if __name__ != 'test.support':
 
 import collections.abc
 import contextlib
+import datetime
 import errno
 import faulthandler
 import fnmatch
@@ -12,6 +13,7 @@ import functools
 import gc
 import importlib
 import importlib.util
+import io
 import logging.handlers
 import nntplib
 import os

Lib/test/test_aifc.py

@@ -7,6 +7,7 @@ import io
 import sys
 import struct
 import aifc
+import warnings
 
 
 class AifcTest(audiotests.AudioWriteTests,

Lib/test/test_argparse.py

@@ -1,5 +1,6 @@
 # Author: Steven J. Bethard <steven.bethard@gmail.com>.
 
+import codecs
 import inspect
 import os
 import shutil

Lib/test/test_asynchat.py

@@ -7,6 +7,7 @@ import asyncore
 import errno
 import socket
 import sys
+import _thread as thread
 import threading
 import time
 import unittest

Lib/test/test_asyncio/test_pep492.py

@@ -4,6 +4,7 @@ import sys
 import types
 import unittest
 
+from test import support
 from unittest import mock
 
 import asyncio

Lib/test/test_asyncio/test_sslproto.py

@@ -15,6 +15,7 @@ import asyncio
 from asyncio import log
 from asyncio import protocols
 from asyncio import sslproto
+from asyncio import tasks
 from test.test_asyncio import utils as test_utils
 from test.test_asyncio import functional as func_tests
 

Lib/test/test_asyncio/test_unix_events.py

@@ -22,6 +22,7 @@ if sys.platform == 'win32':
 
 import asyncio
 from asyncio import log
+from asyncio import base_events
 from asyncio import events
 from asyncio import unix_events
 from test.test_asyncio import utils as test_utils

Lib/test/test_c_locale_coercion.py

@@ -2,6 +2,7 @@
 
 import locale
 import os
+import shutil
 import subprocess
 import sys
 import sysconfig
@@ -9,8 +10,10 @@ import unittest
 from collections import namedtuple
 
 import test.support
-from test.support.script_helper import run_python_until_end
+from test.support.script_helper import (
-
+    run_python_until_end,
+    interpreter_requires_environment,
+)
 
 # Set the list of ways we expect to be able to ask for the "C" locale
 EXPECTED_C_LOCALE_EQUIVALENTS = ["C", "invalid.ascii"]

Lib/test/test_capi.py

@@ -8,6 +8,7 @@ import random
 import re
 import subprocess
 import sys
+import sysconfig
 import textwrap
 import threading
 import time

Lib/test/test_cmd_line.py

@@ -5,6 +5,7 @@
 import os
 import subprocess
 import sys
+import sysconfig
 import tempfile
 import unittest
 from test import support

Lib/test/test_collections.py

@@ -3,9 +3,11 @@
 import collections
 import copy
 import doctest
+import keyword
 import operator
 import pickle
 from random import choice, randrange
+import re
 import string
 import sys
 from test import support

Lib/test/test_contextlib.py

@@ -1,5 +1,6 @@
 """Unit tests for contextlib.py, and other context managers."""
 
+import asyncio
 import io
 import sys
 import tempfile

Lib/test/test_coroutines.py

@@ -2,6 +2,7 @@ import contextlib
 import copy
 import inspect
 import pickle
+import re
 import sys
 import types
 import unittest

Lib/test/test_docxmlrpc.py

@@ -2,6 +2,7 @@ from xmlrpc.server import DocXMLRPCServer
 import http.client
 import sys
 import threading
+from test import support
 import unittest
 
 def make_request_and_skipIf(condition, reason):

Lib/test/test_email/test_policy.py

@@ -1,4 +1,5 @@
 import io
+import sys
 import types
 import textwrap
 import unittest

Lib/test/test_exceptions.py

@@ -9,7 +9,7 @@ import weakref
 import errno
 
 from test.support import (TESTFN, captured_stderr, check_impl_detail,
-                          check_warnings, cpython_only, gc_collect,
+                          check_warnings, cpython_only, gc_collect, run_unittest,
                           no_tracing, unlink, import_module, script_helper,
                           SuppressCrashReport)
 class NaiveException(Exception):

Lib/test/test_faulthandler.py

@@ -9,6 +9,7 @@ import sysconfig
 from test import support
 from test.support import script_helper, is_android
 import tempfile
+import threading
 import unittest
 from textwrap import dedent
 

Lib/test/test_fork1.py

@@ -10,7 +10,8 @@ import time
 import unittest
 
 from test.fork_wait import ForkWait
-from test.support import reap_children, get_attribute, verbose
+from test.support import (reap_children, get_attribute,
+                          import_module, verbose)
 
 
 # Skip test if fork does not exist.

Lib/test/test_frozen.py

@@ -13,6 +13,7 @@
 import sys
 import unittest
 from test.support import captured_stdout
+from importlib import util
 
 
 class TestFrozen(unittest.TestCase):

Lib/test/test_gdb.py

@@ -3,6 +3,7 @@
 # The code for testing gdb was adapted from similar work in Unladen Swallow's
 # Lib/test/test_jit_gdb.py
 
+import locale
 import os
 import platform
 import re

Lib/test/test_generators.py

@@ -3,6 +3,7 @@ import gc
 import pickle
 import sys
 import unittest
+import warnings
 import weakref
 import inspect
 

Lib/test/test_gettext.py

@@ -1,6 +1,7 @@
 import os
 import base64
 import gettext
+import locale
 import unittest
 
 from test import support

Lib/test/test_grammar.py

@@ -4,6 +4,7 @@
 from test.support import check_syntax_error
 import inspect
 import unittest
+import sys
 # testing import *
 from sys import *
 
@@ -11,6 +12,7 @@ from sys import *
 # with import machinery
 import test.ann_module as ann_module
 import typing
+from collections import ChainMap
 from test import ann_module2
 import test
 

Lib/test/test_imaplib.py

@@ -1,6 +1,7 @@
 from test import support
 
 from contextlib import contextmanager
+import errno
 import imaplib
 import os.path
 import socketserver

Lib/test/test_import/__init__.py

@@ -5,6 +5,7 @@ from importlib._bootstrap_external import _get_sourcefile
 import builtins
 import marshal
 import os
+import platform
 import py_compile
 import random
 import stat
@@ -19,9 +20,9 @@ import contextlib
 
 import test.support
 from test.support import (
-    TESTFN, forget, is_jython,
+    EnvironmentVarGuard, TESTFN, check_warnings, forget, is_jython,
-    make_legacy_pyc, rmtree, swap_attr, swap_item, temp_umask,
+    make_legacy_pyc, rmtree, run_unittest, swap_attr, swap_item, temp_umask,
-    unlink, unload, cpython_only, TESTFN_UNENCODABLE,
+    unlink, unload, create_empty_file, cpython_only, TESTFN_UNENCODABLE,
     temp_dir, DirsOnSysPath)
 from test.support import script_helper
 from test.test_importlib.util import uncache

Lib/test/test_importlib/test_locks.py

@@ -4,6 +4,7 @@ init = test_util.import_importlib('importlib')
 
 import sys
 import threading
+import unittest
 import weakref
 
 from test import support

Lib/test/test_locale.py

@@ -3,7 +3,7 @@ import unittest
 import locale
 import sys
 import codecs
-
+import warnings
 
 class BaseLocalizedTest(unittest.TestCase):
     #

Lib/test/test_netrc.py

@@ -1,4 +1,5 @@
 import netrc, os, unittest, sys, tempfile, textwrap
+from unittest import mock
 from test import support
 
 

Lib/test/test_os.py

@@ -9,6 +9,7 @@ import contextlib
 import decimal
 import errno
 import fractions
+import getpass
 import itertools
 import locale
 import mmap

Lib/test/test_posixpath.py

@@ -1,6 +1,7 @@
 import os
 import posixpath
 import unittest
+import warnings
 from posixpath import realpath, abspath, dirname, basename
 from test import support, test_genericpath
 from test.support import FakePath
@@ -11,7 +12,6 @@ try:
 except ImportError:
     posix = None
 
-
 # An absolute path to a temporary filename for testing. We can't rely on TESTFN
 # being an absolute path, so we need this.
 

Lib/test/test_pyclbr.py

@@ -3,11 +3,14 @@
    Nick Mathewson
 '''
 
+import os
 import sys
 from textwrap import dedent
 from types import FunctionType, MethodType, BuiltinFunctionType
 import pyclbr
 from unittest import TestCase, main as unittest_main
+from test import support
+from functools import partial
 
 StaticMethodType = type(staticmethod(lambda: None))
 ClassMethodType = type(classmethod(lambda c: None))

Lib/test/test_pydoc.py

@@ -21,6 +21,7 @@ import urllib.parse
 import xml.etree
 import xml.etree.ElementTree
 import textwrap
+import threading
 from io import StringIO
 from collections import namedtuple
 from test.support.script_helper import assert_python_ok

Lib/test/test_queue.py

@@ -1,8 +1,10 @@
 # Some simple queue module tests, plus some failure conditions
 # to ensure the Queue locks remain stable.
+import collections
 import itertools
 import queue
 import random
+import sys
 import threading
 import time
 import unittest

Lib/test/test_resource.py

@@ -1,5 +1,6 @@
 import contextlib
 import sys
+import os
 import unittest
 from test import support
 import time

Lib/test/test_runpy.py

@@ -11,7 +11,8 @@ import warnings
 from test.support import (
     forget, make_legacy_pyc, unload, verbose, no_tracing,
     create_empty_file, temp_dir)
-from test.support.script_helper import make_script, make_zip_script
+from test.support.script_helper import (
+    make_pkg, make_script, make_zip_pkg, make_zip_script)
 
 
 import runpy

Lib/test/test_sax.py

@@ -17,6 +17,7 @@ from xml.sax.handler import feature_namespaces, feature_external_ges
 from xml.sax.xmlreader import InputSource, AttributesImpl, AttributesNSImpl
 from io import BytesIO, StringIO
 import codecs
+import gc
 import os.path
 import shutil
 from urllib.error import URLError

Lib/test/test_signal.py

@@ -5,6 +5,7 @@ import socket
 import statistics
 import subprocess
 import sys
+import threading
 import time
 import unittest
 from test import support

Lib/test/test_smtplib.py

@@ -19,7 +19,7 @@ import threading
 
 import unittest
 from test import support, mock_socket
-from test.support import HOST
+from test.support import HOST, HOSTv4, HOSTv6
 from unittest.mock import Mock
 
 

Lib/test/test_subprocess.py

@@ -3,6 +3,7 @@ from unittest import mock
 from test import support
 import subprocess
 import sys
+import platform
 import signal
 import io
 import itertools
@@ -19,12 +20,18 @@ import gc
 import textwrap
 from test.support import FakePath
 
+try:
+    import ctypes
+except ImportError:
+    ctypes = None
+else:
+    import ctypes.util
+
 try:
     import _testcapi
 except ImportError:
     _testcapi = None
 
-
 if support.PGO:
     raise unittest.SkipTest("test is not helpful for PGO")
 

Lib/test/test_thread.py

@@ -4,6 +4,7 @@ import random
 from test import support
 import _thread as thread
 import time
+import sys
 import weakref
 
 from test import lock_tests

Lib/test/test_threaded_import.py

@@ -15,7 +15,7 @@ import threading
 import unittest
 from unittest import mock
 from test.support import (
-    verbose, run_unittest, TESTFN, reap_threads,
+    verbose, import_module, run_unittest, TESTFN, reap_threads,
     forget, unlink, rmtree, start_threads)
 
 def task(N, done, done_tasks, errors):

Lib/test/test_threadedtempfile.py

@@ -13,22 +13,19 @@ quickly. Guido reports needing to boost FILES_PER_THREAD to 500 before
 provoking a 2.0 failure under Linux.
 """
 
+NUM_THREADS = 20
+FILES_PER_THREAD = 50
+
 import tempfile
 
-from test.support import start_threads
+from test.support import start_threads, import_module
 import unittest
 import io
 import threading
 from traceback import print_exc
 
-
-NUM_THREADS = 20
-FILES_PER_THREAD = 50
-
-
 startEvent = threading.Event()
 
-
 class TempFileGreedy(threading.Thread):
     error_count = 0
     ok_count = 0

Lib/test/test_time.py

@@ -9,6 +9,7 @@ import sysconfig
 import time
 import threading
 import unittest
+import warnings
 try:
     import _testcapi
 except ImportError:

Lib/test/test_tokenize.py

@@ -1,7 +1,7 @@
 from test import support
 from tokenize import (tokenize, _tokenize, untokenize, NUMBER, NAME, OP,
                      STRING, ENDMARKER, ENCODING, tok_name, detect_encoding,
-                     open as tokenize_open, Untokenizer,
+                     open as tokenize_open, Untokenizer, generate_tokens,
                      NEWLINE)
 from io import BytesIO
 import unittest

Lib/test/test_traceback.py

@@ -110,7 +110,7 @@ class TracebackCases(unittest.TestCase):
         # Test that tracebacks are correctly printed for encoded source files:
         # - correct line number (Issue2384)
         # - respect file encoding (Issue3975)
-        import sys, subprocess
+        import tempfile, sys, subprocess, os
 
         # The spawned subprocess has its stdout redirected to a PIPE, and its
         # encoding may be different from the current interpreter, on Windows

Lib/test/test_utf8_mode.py

@@ -3,6 +3,7 @@ Test the implementation of the PEP 540: the UTF-8 Mode.
 """
 
 import locale
+import os
 import sys
 import textwrap
 import unittest

Lib/test/test_venv.py

@@ -15,6 +15,7 @@ import sys
 import tempfile
 from test.support import (captured_stdout, captured_stderr, requires_zlib,
                           can_symlink, EnvironmentVarGuard, rmtree)
+import threading
 import unittest
 import venv