Version 4.8.0rc1 fails on Python 3.7 with SyntaxError in typing_extensions.py line 874 about typing_extensions

[andy-maier]

Thanks for the quick response.
That explains why the error appears.

And the setup.py based install that happily installs 4.8.0rc1 on Python 3.7 is not really your problem, I guess. It is just another indicator that we should get off of setup.py based installs.

As far as I'm concerned, this issue can be closed.

[andy-maier]

The pip based install process correctly does pick up an older version.
It is only the setup.py based install that ends up installing 4.8.0rc1 on Python 3.7, and the install folks have long recommended to no longer use setup.py for install. I'll remove the setup.py based install from our install tests.

[AlexWaygood]

4.8.0rc1 no longer supports Python 3.7 (as Python 3.7 is now end-of-life), and this is stated in our pyproject.toml file:

typing_extensions/pyproject.toml

Line 12 in df9e322

requires-python = ">=3.8"

[AlexWaygood]

Looks like you're doing some complicated stuff here: https://github.com/pywbem/nocaselist/blob/master/tests/installtest/test_install.sh

All I can say is that pip install typing_extensions on Python 3.7 should cause pip's resolver to pick an older version of typing_extensions, as pip looks at the requires-python field before selecting which version to install. That means one of the following must be going on:

1. There's a bug in pip's resolver
2. you're doing something... Strange in your script that's confusing pip's resolver somehow and meaning that it's selecting a version of typing_extensions that's incompatible with Python 3.7 :-)

I haven't looked too deeply here, but I suspect it's (2) ;-)