How Can I Install Python Packages to a Custom Directory Using Pip?

Installing Python Packages in Non-Default Directories with Pip

Installing Python packages into a specific directory, rather than the default site-packages, can provide benefits such as segregation or compatibility. While using virtualenv and virtualenvwrapper is a common solution, this may not be feasible in all cases.

To modify the pip command for package installation outside the default site-packages, the --target switch comes into play:

pip install --target <dir> <package_name>

where

represents the desired installation directory. However, to utilize the installed packages from the non-default location, it's crucial to add to the PYTHONPATH environmental variable.

The --target switch is a valuable tool for controlling package installation locations. Older versions of pip may not support this option. In such cases, it's recommended to upgrade pip:

Linux or OS X:

pip install -U pip

Windows (to circumvent an issue):

python -m pip install -U pip

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