How Can I Manage Multiple Python Versions and Their Corresponding pip Installations?

Addressing Multiple Python Versions and PIP

Managing multiple Python versions and the corresponding PIP installations can be challenging. Historically, easy_install offered the functionality of targeting specific Python versions through its version-suffixed commands, e.g., easy_install-2.5. However, this approach is not available with PIP.

Current Recommendation: python -m pip

The recommended solution is to utilize the command python -m pip, where python represents the desired Python version. This method is compatible with all Python versions and virtualenv setups.

# System default Python:
$ python -m pip install fish

# Virtualenv's Python:
$ .env/bin/python -m pip install fish

# Specific Python version:
$ python-3.6 -m pip install fish

Previous Recommendation: pip-{version} (Deprecated)

Prior to PIP version 1.5, you could install PIP packages for specific Python versions using the pip-{version} syntax, similar to easy_install-{version}.

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

However, starting with PIP 1.5, the schema was modified to pipVERSION. Thus, the following syntax should be used for PIP versions 1.5 and higher:

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

Conclusion

By leveraging the suggested approaches, you can effectively manage multiple Python versions and PIP installations, ensuring seamless package management for your development environment.

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