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I looked up how to install multiple packages from a requirements document using pip. The answers were mostly:
pip install -r requirements.txt What does the -r do though? I can't find an answer for this and it isn't listed when I run pip help.
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In your case pip install -r requirements. txt will install the libraries listed in your requirements. txt file.
Pip is a package management system used to install/manage software packages from Python Package Index. Pip is simple and user friendly. Usually, as users, we don't need to worry about prerequisites when we install a package via pip.
txt. If you are managing Python packages (libraries) with pip, you can use the configuration file requirements. txt to install the specified packages with the specified version.
Requirements files serve as a list of items to be installed by pip, when using pip install. Files that use this format are often called “pip requirements. txt files”, since requirements. txt is usually what these files are named (although, that is not a requirement).
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:
pip install
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-rwill search for requirement file.
pip install --help
will help you !!
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