How to Install Packages from a Local Directory Using Requirements.txt?

Installing Packages from Local Directory Using Requirements.txt

Installing packages using the Python package manager, pip, from a local requirements.txt file can be a convenient way to manage Python dependencies for a project. However, if you have a local archive directory containing the packages, you may encounter unexpected issues when installing from a requirements.txt file in a different location.

In the scenario presented, you attempted to install packages from a local archive directory using the command:

pip install -r /path/to/requirements.txt -f file:///path/to/archive/

However, trotz the seemingly successful output, the packages were not properly installed. This was due to a misunderstanding of how pip handles local package archives.

The correct approach to install packages from a local requirements.txt file is to first ensure that the packages are available in the package index. This involves creating a local package index using the following command:

pip install --index-url file:///path/to/archive/ --no-index setuptools

Once the local package index is created, you can then install the packages from the requirements.txt file using the following command:

pip install -r /path/to/requirements.txt

This will successfully install the packages from the local index, without the need to specify the -f flag.

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