Users must include the same imports required to run directly in Python.

Patch by Costas.

Thanks to Xiang Zhang for the patch.

Windows.

Originally only b'PYTHONCASEOK' was being checked for in os.environ,
but that won't work under Windows where all environment variables are
strings (on OS X they are bytes).

Thanks to Eryk Sun for the bug report.

type issues be about 'path' instead of 'name'.

Thanks to Lev Maximov for the patch.

Patch by Stéphane Wirtel.

Patch by Ammar Askar.

Patch by Evelyn Mitchell.

Patch by John Hagen.

Patch by Jim Fulton.

in case of embedded null characters/bytes.  Patch by Xiang Zhang.

Patch by Nathan Harold.

concatenations.  Patch by Xiang Zhang.

This backports the fix from #16611, per discussion with the release
manager.

Patch by Jaysinh Shukla.

confirming the netscape cookie format.

generated by Argument Clinic.  Patch by Petr Viktorin.