How Can I Manage Multiple Python Versions and pip Effectively?

Pip and Multiple Python Versions: A Symphony for Developers

Managing multiple Python versions and PIP can pose challenges. To tackle this, you seek ways to explicitly install packages to specific installations.

Introducing python -m pip, the universal solution. This command allows you to specify the Python version you wish to use, across all operating systems and virtual environments. For instance:

$ python -m pip install fish  # Use the default system Python
$ .env/bin/python -m pip install fish  # Use Python from a virtualenv
$ python-3.6 -m pip install fish  # Use a specific Python version

Previously, Pip employed the convention of naming its executable using the format pip-{version}, similar to easy_install-{version}. This allowed for explicit versioning:

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

However, this schema changed with Pip version 1.5, introducing pipVERSION instead of pip-{version}. For versions 1.5 and above, use the following syntax:

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

Embrace the convenience of python -m pip to effortlessly manage multiple Python versions and PIP installations. Unleash the full potential of your Python projects with this versatile command.

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