How Can I Install Specific Python Package Versions with Pip, and Handle Version Conflicts?

Installing Specific Package Versions with Pip

To install a specific package version using pip, it is important to consider the following:

Challenge with Overwriting Existing Versions

When installing a package with a different version than the one already installed, it is recommended to first uninstall the existing version or use the -I (ignore-installed) option.

Error with MySQL_python Installation

In the specific case of installing MySQL_python version 1.2.2, it may fail due to an issue with PyPI's URL link being broken.

Solution

To resolve this issue:

1. Uninstall the existing MySQL_python package.

2. Use the following command with the -I and -v (verbose) options:

   pip install -Iv http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.2/MySQL-python-1.2.2.tar.gz/download

Alternative Solution (Updated 2022-12-28)

A more recent approach is to use the --force-reinstall option with the -v (verbose) option:

pip install --force-reinstall -v "MySQL_python==1.2.2"

This will reinstall all packages, even if they are up-to-date, and provides additional verbosity for debugging purposes.

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