Clean-up typing_extensions after support dropped for older Pythons

.flake8

@@ -1,7 +1,5 @@
 [flake8]
 
-# fake builtins for python2/*
-builtins = basestring, unicode
 max-line-length = 90
 ignore =
   # irrelevant plugins

.flake8-tests

@@ -6,8 +6,6 @@
 # This will be possibly merged in the future.
 
 [flake8]
-# fake builtins for python2/*
-builtins = basestring, unicode
 max-line-length = 100
 ignore =
   # temporary ignores until we sort it out

CONTRIBUTING.md

@@ -18,11 +18,10 @@ standard library, so that users can experiment with them before they are added t
 standard library. Such features should ideally already be specified in a PEP or draft
 PEP.
 
-`typing_extensions` still supports all Python versions supported by `typing`, down to
-Python 2.7 and 3.4. However, it is OK to omit support for Python versions that have
+`typing_extensions` supports Python 3.6+. However, it is OK to omit support for Python versions that have
 reached end of life if doing so is too difficult or otherwise does not make sense. For
-example, `typing_extensions.AsyncGenerator` only exists on Python 3.6 and higher,
-because async generators were added to the language in 3.6.
+example, `typing_extensions.AsyncGenerator` was only supported in Python 3.6 and newer, because async 
+generators were not part of the language before then.
 
 # Versioning scheme
 
@@ -41,12 +40,8 @@ new release that doesn't include any new standard library features would be call
 - Build the source and wheel distributions:
 
   - `pip3 install -U setuptools wheel`
-  - `pip2 install -U setuptools wheel`
   - `rm -rf dist/ build/`
   - `python3 setup.py sdist bdist_wheel`
-  - `rm -rf build/` (Works around
-    `a Wheel bug <https://bitbucket.org/pypa/wheel/issues/147/bdist_wheel-should-start-by-cleaning-up>`\_)
-  - `python2 setup.py bdist_wheel`
 
 - Install the built distributions locally and test (if you were using `tox`, you already
   tested the source distribution).

test-requirements.txt

@@ -1,5 +1,4 @@
-flake8; python_version >= '3.6'
-flake8-bugbear; python_version >= '3.6'
-flake8-pyi; python_version >= '3.6'
-pytest==4.6.11; python_version < '3.0'
-pytest; python_version >= '3.0'
+flake8
+flake8-bugbear
+flake8-pyi
+pytest

typing_extensions/README.rst

@@ -43,7 +43,7 @@ This module currently contains the following:
 - ``Literal``
 - ``NewType``
 - ``NoReturn``
-- ``overload`` (note that older versions of ``typing`` only let you use ``overload`` in stubs)
+- ``overload``
 - ``OrderedDict``
 - ``ParamSpec``
 - ``ParamSpecArgs``
@@ -57,6 +57,14 @@ This module currently contains the following:
 - ``TypeGuard``
 - ``TYPE_CHECKING``
 
+Python 3.7+
+-----------
+
+- ``get_origin``
+- ``get_args``
+- ``get_type_hints``
+
+
 Other Notes and Limitations
 ===========================
 

typing_extensions/setup.py

@@ -1,13 +1,10 @@
 #!/usr/bin/env python
-# coding: utf-8
 
 import sys
 from setuptools import setup
 
 if sys.version_info < (3, 6, 0):
-    sys.stderr.write('ERROR: You need Python 3.6+ '
-                     'to install typing_extensions.\n')
-    exit(1)
+    sys.exit('ERROR: You need Python 3.6+ to install typing_extensions.\n')
 
 version = '3.10.0.2'
 description = 'Backported and Experimental Type Hints for Python 3.6+'
@@ -47,9 +44,11 @@
       author_email='levkivskyi@gmail.com',
       url='https://github.com/python/typing/blob/master/typing_extensions/README.rst',
       license='PSF',
+      license_files=["LICENSE"],
       keywords='typing function annotations type hints hinting checking '
                'checker typehints typehinting typechecking backport',
       package_dir={'': 'src_py3'},
       py_modules=['typing_extensions'],
+      python_requires=">=3.6",
       classifiers=classifiers,
       )