id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 18115 "Warn that repeated ""setup.py install"" without removal causes problems" Carl Meyer nobody "If you repeatedly install newer versions of Django (or any other Python project) using ""python setup.py install"", without removing the previously-installed version, any files removed in the newer version will never be removed from your site-packages. This can potentially cause a variety of problems, including imports continuing to ""work"" (with outdated code) that ought to fail, and most visibly in Django 1.4, extraneous files in the startproject template. The installation instructions ought to include a clear warning against this. Currently there's a bit of a warning at the end of [https://docs.djangoproject.com/en/dev/topics/install/#installing-an-official-release-manually this section], but it's not as clear as it could be about the specific risk of repeated ""setup.py install"", and it's in the section about installing using a pth file or symbolic link, which is a different thing entirely." Cleanup/optimization closed Documentation 1.4 Normal fixed Ready for checkin 1 0 0 0 0 0