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 This can potentially cause a variety of problems, including imports continuing to ""work"" (with outdated code) that ought to fail, and most visibly in Django 1.4, extraneous files in the startproject template.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