What does " -r " do in pip install -r requirements.txt

python python-2.7 pip package-managers

Instead of pip --help, look into pip install --help:

-r, --requirement Install from the given requirements file. This option can be used multiple times.

Also see these documentation paragraphs:

python python-2.7 pip package-managers

-r will search for requirement file.

pip install --help

will help you !!

python python-2.7 pip package-managers

In your case pip install -r requirements.txt will install the libraries listed in your requirements.txt file.

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