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Install packages from:
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- VCS project urls.
- Local project directories.
- Local or remote source archives.
pip also supports installing from "requirements files", which provide
an easy way to specify a whole environment to be installed.
s%
%prog [options] <requirement specifier> [package-index-options] ...
%prog [options] -r <requirements file> [package-index-options] ...
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%prog [options] [-e] <local project path> ...
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s| We recommend you use --use-feature=2020-resolver to test your packages with the new resolver before it becomes the default.
t yeari� t monthi t dayi s� Pip will install or upgrade your package(s) and its dependencies without taking into account other packages you already have installed. This may cause an uncaught dependency conflict.
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� t S( sZ Determine whether to do a user install based on the input options.
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