pip (1.3.1) not upgrading packages until the local cache is deleted

Question

I am trying to upgrade PACKAGENAME using the following:

pip install --index http://pypi.MYSITE.com/simple/ --upgrade PACKAGENAME

I often see that no files are downloaded from the server and pip says all packages were installed successfully, but when I check the version installed it is not the newest version on the server.

However, if I delete pip's cache and run the above command again, it does download files from the server and install the newest version. Has anyone experienced this issue?

One workaround I found is to pass the --ignore-installed argument to pip install, but this causes pip to download all packages from server even if the newest version is already installed.

please list the pip version in question and platform if possible, pip 1.3.1 has this problem, it hides the error message, pip 1.4 fixed — Larry Cai, Jul 31 '13 at 15:14
Possible duplicate of [Removing pip's cache?](http://stackoverflow.com/questions/9510474/removing-pips-cache) — Piotr Dobrogost, Feb 15 '16 at 11:58

score 4 · Accepted Answer · answered Jul 31 '13 at 16:15

It is the issue in pip 1.3.1, I met same problem in Ubuntu 12.10 and Windows, Upgrade to pip 1.4 (so far latest) can solve this problem

There are conflicts in the cache, if you upgrade to 1.4 like using virtualenv if you don't want to update the real environment, you will see the error message.

score 0 · Answer 2 · edited May 23 '17 at 12:07

(...) if I delete pip's cache (...)

Prior to pip 6.0 you had to pass --download-cache option to use download cache. As you use pip 1.3.1 and you don't pass this option there's nothing in cache. I suspect what you observe is a bug related to pip (wrongly) reusing build directories. This was fixed in version 1.4 of pip which was released on 2013-07-23. See my answer to the question Why is pip installing an old version of my package? for more details.

pip (1.3.1) not upgrading packages until the local cache is deleted

2 Answers2