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Removed obsolete version check in setup.py. 

This was originally added to ensure that Django 2.0+ could not be
installed on Python 2.7 or earlier, in particular where the version of
pip or setuptools being used did not support the python_requires
argument.

Unfortunately, as REQUIRED_PYTHON has been bumped, this check no longer
satisfies its original purpose and could be misleading, e.g. if
REQUIRED_PYTHON is 3.8 and CURRENT_PYTHON is 3.7 it would request that
Django < 2 is installed, but there are later versions of Django that
support Python 3.7.

By the time Django 4 is released in December 2021, the python_requires
argument will have been supported for over five years, and Python 2 will
have been EOL for nearly two years, so we can remove this check.

See https://packaging.python.org/guides/distributing-packages-using-setuptools/#python-requires
This commit is contained in:
Nick Pope 2021-04-15 07:12:35 +01:00 committed by GitHub
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commit 78eaae9bf1
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@ -4,35 +4,6 @@ from distutils.sysconfig import get_python_lib
from setuptools import setup
CURRENT_PYTHON = sys.version_info[:2]
REQUIRED_PYTHON = (3, 8)
# This check and everything above must remain compatible with Python 2.7.
if CURRENT_PYTHON < REQUIRED_PYTHON:
sys.stderr.write("""
==========================
Unsupported Python version
==========================
This version of Django requires Python {}.{}, but you're trying to
install it on Python {}.{}.
This may be because you are using a version of pip that doesn't
understand the python_requires classifier. Make sure you
have pip >= 9.0 and setuptools >= 24.2, then try again:
$ python -m pip install --upgrade pip setuptools
$ python -m pip install django
This will install the latest version of Django which works on your
version of Python. If you can't upgrade your pip (or Python), request
an older version of Django:
$ python -m pip install "django<2"
""".format(*(REQUIRED_PYTHON + CURRENT_PYTHON)))
sys.exit(1)
# Warn if we are installing over top of an existing installation. This can
# cause issues where files that were deleted from a more recent Django are
# still present in site-packages. See #18115.