How Can I Effectively Manage PIP for Multiple Python Versions?

Handling Multiple Python Versions and PIP

Managing multiple Python versions can be challenging when using PIP for package management. This article explores how to utilize PIP effectively across different versions of Python.

Recommendation: Using python -m pip

The recommended approach is to use python -m pip, where python specifies the desired Python version. This method works flawlessly across various Python versions and virtualenv environments.

For instance:

# Using the system default Python:
$ python -m pip install fish

# Using Python within a virtualenv:
$ .env/bin/python -m pip install fish

# Installing packages using a specific Python version:
$ python-3.6 -m pip install fish

Legacy Method: Using pip-{version}

In PIP versions prior to 1.5, the pip-{version} syntax was used to handle multiple Python installations. This method allowed users to install packages for specific Python versions.

$ pip-2.5 install myfoopackage
$ pip-2.6 install otherpackage
$ pip-2.7 install mybarpackage

However, this approach is no longer recommended due to ongoing schema changes. For PIP versions 1.5 and later, use pipVERSION instead of pip-VERSION as follows:

$ pip2.6 install otherpackage
$ pip2.7 install mybarpackage

Resources

• [PIP Multiple Python Versions Issue](https://github.com/pypa/pip/issues/200)
• [PIP 0.8 News](https://pip.pypa.io/en/stable/news/#v0-8)
• [PIP 1.5 Pull Request](https://github.com/pypa/pip/pull/1053)

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