Removing pip s cache

Question

I need to install psycopg2 v2 4 1 specifically  I accidentally did    pip install psycopg2   Instead of    pip install psycopg2  2 4 1   That installs 2 4 4 instead of the earlier version    Now even after I pip uninstall psycopg2 and attempt to reinstall with the correct version  it appears that pip is re-using the cache it downloaded the first time   How can I force pip to clear out its download cache and use the specific version I m including in the command

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If using virtualenv  look for the build directory under your environments root

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I had to delete  TEMP  pip-build On Windows 7

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I just had a similar problem and found that the only way to get pip to upgrade the package was to delete the  PWD build   CD  build on Windows  directory that might have been left over from a previously unfinished install or a previous version of pip  it now deletes the build directories after a successful install

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Clear the cache directory where appropriate for your system Linux and Unix    cache pip    and it respects the XDG CACHE HOME directory   OS X   Library Caches pip  Windows  LocalAppData  pip Cache  UPDATE With pip 20 1 or later  you can find the full path for your operating system easily by typing this in the command line  pip cache dir  Example output on my Ubuntu installation    pip3 cache dir  home tawanda  cache pip

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On Ubuntu  I had to delete  tmp pip-build-root

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pip maintainer here   The specific issue of  quot installing the wrong version due to caching quot  issue mentioned in the question was fixed in pip 1 4  back in 2013     Fix a number of issues related to cleaning up and not reusing build directories    413   709   634   602   939   865   948   Since pip 6 0  back in 2014    pip install  pip download and pip wheel commands can be told to avoid using the cache with the --no-cache-dir option   eg  pip install --no-cache-dir  lt package gt   Since pip 10 0  back in 2018    a pip config command was added  which can be used to configure pip to always ignore the cache -- pip config set global cache-dir false configures pip to not use the cache  quot globally quot   i e  in all commands   Since pip 20 1  pip has a pip cache command to manage the contents of pip s cache   pip cache purge removes all the wheel files in the cache  pip cache remove matplotlib selectively removes files related to a matplotlib from the cache    In summary  pip provides a lot of ways to tweak how it uses the cache   pip install --no-cache-dir  lt package gt   install a package without using the cache  for just this run  pip config set global cache-dir false  configure pip to not use the cache  quot globally quot   in all commands  pip cache remove matplotlib  removes all wheel files related to matplotlib from pip s cache  pip cache purge  to clear all files from pip s cache

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From documentation at https   pip pypa io en latest reference pip install html caching      Starting with v6 0  pip provides an on-by-default cache which   functions similarly to that of a web browser  While the cache is on by   default and is designed do the right thing by default you can disable   the cache and always access PyPI by utilizing the --no-cache-dir   option

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On Windows 7  I had to delete  HOMEPATH  pip

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it appears that pip is re-using the cache         I m pretty sure that s not what s happening  Pip used to  wrongly  reuse build directory not cache  This was fixed in version 1 4 of pip which was released on 2013-07-23

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Since pip 20 1b1  which was released on 21 April 2020 and  added pip cache command for inspecting managing pip   s wheel cache   it is possible to issue this command   pip cache purge   The reference guide is here  https   pip pypa io en stable reference pip cache  The corresponding pull request is here

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A better way to do it is to delete the cache and rebuild it  In this way  if you install it again for other virtualenv  it will use the cache instead of building every time when you install it   For example  when you install it  it will say it uses cached wheel   Processing  lt some prefix gt  Library Caches pip wheels d0 c4 e4 e49fd07bca8dda00dd6b4bbc606aa05a25aacb00d45747a47a horovod-0 19 3-cp37-cp37m-macosx 10 9 x86 64 wh   Just delete that one and restart your install

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If you like to set the --no-cache-dir option by default  you can put this into pip conf   global  no-cache-dir   false  Note 1  It s confusing  but to enable the no-cache-dir option you actually have to set it to false  Pretty silly if you ask me    but that s how it is  There is a github issue to fix this  Note 2  The location of pip conf depends on your OS  See the documentation for more info

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If using pip 6 0 or newer  try adding the --no-cache-dir option  source   If using pip older than pip 6 0  upgrade it with pip install -U pip

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On Mac OS  Mavericks   I had to delete  tmp pip-build

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On archlinux pip cache is located at    cache pip  I could solve my issue by removing the http folder inside it

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pip can install a package ignoring the cache  like this  pip --no-cache-dir install scipy

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Simply rm -d -r  quot   pip cache dir  quot

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On my mac I had to remove the cache directory   Library Caches pip

[python] Removing pip's cache?

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