What is the difference between using the -m option when installing packages via pip and regular installation without it?

The -m option in Python is used to run a module as a script. When you execute the command:

python -m pip install package_name

you are running the pip module through the Python interpreter. This ensures that the pip used is the one associated with the Python version you are working with.

If you simply run pip install package_name from the command line, the system's pip might be used, which is not always linked to the desired Python version, especially if multiple versions are installed.

Therefore, using python -m pip guarantees:

• Explicit specification of the Python version
• Avoidance of conflicts between multiple installed pip versions
• More reliable installation of packages in the correct environment

It is recommended to use python -m pip for installing packages, especially in virtual environments.