[Bug 1940705] Re: distutils and sysconfig returns unexpected paths

[Stefano Rivera]

Fixed in 3.10.2-3.

** Changed in: python3.10 (Ubuntu)
       Status: Confirmed => Fix Released

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Title:
  distutils and sysconfig returns unexpected paths

Status in python3.10 package in Ubuntu:
  Fix Released

Bug description:
  Debian and Ubuntu’s Python 3.9 (and prior) patches distutils so pip
  installs things to /usr/local/lib/python3.Y/dist-packages, but 3.10
  does not do the same:

  $ python3.10
  Python 3.10.0b1 (default, May 11 2021, 08:45:09) [GCC 10.3.0] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>> from distutils.command.install import install
  <stdin>:1: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
  >>> from distutils.dist import Distribution
  >>> c = install(Distribution())
  >>> c.finalize_options()
  >>> c.install_platlib
  '/usr/lib/python3.10/dist-packages'

  Furthermore, pip is planning to switch to sysconfig for fetching the
  path soon (could happen before Ubuntu 21.10), and 3.10’s sysconfig is
  currently returning a different, but still unexpected path:

  >>> import sysconfig
  >>> sysconfig.get_path('platlib')
  '/usr/lib/python3.10/site-packages'

  Neither path would break the system (apt puts packages under
  /usr/lib/python3/dist-packages), but my understanding is pip
  installing things into /usr/lib is still not ideal. So both of those
  need to be fixed, and they need to point to the same location (also
  purelib, headers/include, scripts, and data).

  ----

  Some context to this: The python3.10 package is backported to earlier
  Ubuntu versions by deadsnakes, which does not ship python3.10-pip, so
  people are installing the upstream pip directly. And when they do
  this, /usr/bin/pip gets overwritten unexpectedly.

  deadsnakes: https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa

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