Installing specific package versions with pip


I"m trying to install version 1.2.2 of the MySQL_python adaptor, using a fresh virtualenv created with the --no-site-packages option. The current version shown in PyPi is 1.2.3. Is there a way to install the older version? I found an article stating that this should do it:

pip install MySQL_python==1.2.2

When installed, however, it still shows MySQL_python-1.2.3-py2.6.egg-info in the site packages. Is this a problem specific to this package, or am I doing something wrong?

Answer rating: 1114


  • pip install -Iv (i.e. pip install -Iv MySQL_python==1.2.2)

First, I see two issues with what you"re trying to do. Since you already have an installed version, you should either uninstall the current existing driver or use pip install -I MySQL_python==1.2.2

However, you"ll soon find out that this doesn"t work. If you look at pip"s installation log, or if you do a pip install -Iv MySQL_python==1.2.2 you"ll find that the PyPI URL link does not work for MySQL_python v1.2.2. You can verify this here:

The download link 404s and the fallback URL links are re-directing infinitely due to"s recent upgrade and PyPI"s stale URL.

So to properly install the driver, you can follow these steps:

pip uninstall MySQL_python
pip install -Iv

Answer rating: 626

You can even use a version range with pip install command. Something like this:

pip install "stevedore>=1.3.0,<1.4.0"

And if the package is already installed and you want to downgrade it add --force-reinstall like this:

pip install "stevedore>=1.3.0,<1.4.0" --force-reinstall

Answer rating: 173

One way, as suggested in this post, is to mention version in pip as:

pip install -Iv MySQL_python==1.2.2

i.e. Use == and mention the version number to install only that version. -I, --ignore-installed ignores already installed packages.

Answer rating: 83

To install a specific python package version whether it is the first time, an upgrade or a downgrade use:

pip install --force-reinstall MySQL_python==1.2.4

MySQL_python version 1.2.2 is not available so I used a different version. To view all available package versions from an index exclude the version:

pip install MySQL_python==

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