Drop Python 2 support for typing_extensions (#893)

Update README accordingly

.flake8

@@ -14,5 +14,4 @@ ignore =
 exclude =
   # tests have more relaxed formatting rules
   # and its own specific config in .flake8-tests
-  typing_extensions/src_py2/test_typing_extensions.py,
   typing_extensions/src_py3/test_typing_extensions.py,

.github/workflows/ci.yml

@@ -8,28 +8,6 @@ permissions:
   contents: read
 
 jobs:
-  tests-27:
-    name: Run tests (2.7)
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Set up Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 2.7
-
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install -r test-requirements.txt
-
-      - name: Test typing_extensions
-        run: |
-          pip install typing
-          pytest typing_extensions/src_py2
-
   tests:
     name: Run tests
 
@@ -94,4 +72,4 @@ jobs:
         run: flake8
 
       - name: Lint tests
-        run: flake8 --config=.flake8-tests typing_extensions/src_py2/test_typing_extensions.py typing_extensions/src_py3/test_typing_extensions.py
+        run: flake8 --config=.flake8-tests typing_extensions/src_py3/test_typing_extensions.py

typing_extensions/MANIFEST.in

@@ -1,5 +1,3 @@
 include LICENSE README.rst
 include src_py3/typing_extensions.py
 include src_py3/test_typing_extensions.py
-include src_py2/typing_extensions.py
-include src_py2/test_typing_extensions.py

typing_extensions/README.rst

@@ -9,13 +9,7 @@ Typing Extensions
 Overview
 ========
 
-The ``typing`` module was added to the standard library in Python 3.5 on
-a provisional basis and will no longer be provisional in Python 3.7. However,
-this means users of Python 3.5 - 3.6 who are unable to upgrade will not be
-able to take advantage of new types added to the ``typing`` module, such as
-``typing.Text`` or ``typing.Coroutine``.
-
-The ``typing_extensions`` module contains both backports of these changes
+The ``typing_extensions`` module contains both backports of ``typing`` features
 as well as experimental types that will eventually be added to the ``typing``
 module, such as ``Protocol`` (see PEP 544 for details about protocols and
 static duck typing) or ``TypedDict`` (see PEP 589).
@@ -30,11 +24,17 @@ Included items
 
 This module currently contains the following:
 
-All Python versions:
---------------------
-
+- ``Annotated``
+- ``AsyncContextManager``
+- ``AsyncGenerator``
+- ``AsyncIterable``
+- ``AsyncIterator``
+- ``Awaitable``
+- ``ChainMap``
 - ``ClassVar``
+- ``Concatenate``
 - ``ContextManager``
+- ``Coroutine``
 - ``Counter``
 - ``DefaultDict``
 - ``Deque``
@@ -45,38 +45,17 @@ All Python versions:
 - ``NoReturn``
 - ``overload`` (note that older versions of ``typing`` only let you use ``overload`` in stubs)
 - ``OrderedDict``
-- ``Protocol`` (except on Python 3.5.0)
-- ``runtime_checkable`` (except on Python 3.5.0)
+- ``ParamSpec``
+- ``ParamSpecArgs``
+- ``ParamSpecKwargs``
+- ``Protocol``
+- ``runtime_checkable``
 - ``Text``
 - ``Type``
 - ``TypedDict``
 - ``TypeAlias``
-- ``TYPE_CHECKING``
-
-Python 3.4+ only:
------------------
-
-- ``ChainMap``
-- ``ParamSpec``
-- ``Concatenate``
-- ``ParamSpecArgs``
-- ``ParamSpecKwargs``
 - ``TypeGuard``
-
-Python 3.5+ only:
------------------
-
-- ``Annotated`` (except on Python 3.5.0-3.5.2)
-- ``AsyncIterable``
-- ``AsyncIterator``
-- ``AsyncContextManager``
-- ``Awaitable``
-- ``Coroutine``
-
-Python 3.6+ only:
------------------
-
-- ``AsyncGenerator``
+- ``TYPE_CHECKING``
 
 Other Notes and Limitations
 ===========================
@@ -101,4 +80,3 @@ To run tests, navigate into the appropriate source directory and run
 ``test_typing_extensions.py``. You will also need to install the latest
 version of ``typing`` if you are using a version of Python that does not
 include ``typing`` as a part of the standard library.
-

typing_extensions/setup.py

@@ -4,8 +4,8 @@
 import sys
 from setuptools import setup
 
-if sys.version_info < (2, 7, 0) or (3, 0, 0) <= sys.version_info < (3, 6, 0):
-    sys.stderr.write('ERROR: You need Python 2.7 or 3.6+ '
+if sys.version_info < (3, 6, 0):
+    sys.stderr.write('ERROR: You need Python 3.6+ '
                      'to install typing_extensions.\n')
     exit(1)
 
@@ -31,7 +31,6 @@
     'Intended Audience :: Developers',
     'License :: OSI Approved :: Python Software Foundation License',
     'Operating System :: OS Independent',
-    'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3.6',
     'Programming Language :: Python :: 3.7',
     'Programming Language :: Python :: 3.8',
@@ -40,13 +39,6 @@
     'Topic :: Software Development',
 ]
 
-if sys.version_info.major == 2:
-    package_dir = 'src_py2'
-elif sys.version_info.major == 3:
-    package_dir = 'src_py3'
-else:
-    raise AssertionError()
-
 setup(name='typing_extensions',
       version=version,
       description=description,
@@ -57,7 +49,7 @@
       license='PSF',
       keywords='typing function annotations type hints hinting checking '
                'checker typehints typehinting typechecking backport',
-      package_dir={'': package_dir},
+      package_dir={'': 'src_py3'},
       py_modules=['typing_extensions'],
       classifiers=classifiers,
-      install_requires=["typing >= 3.7.4; python_version < '3.5'"])
+      )