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    Install packages from:

    - PyPI (and other indexes) using requirement specifiers.
    - 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.
    tinstalls%
      %prog [options] <requirement specifier> [package-index-options] ...
      %prog [options] -r <requirements file> [package-index-options] ...
      %prog [options] [-e] <vcs project url> ...
      %prog [options] [-e] <local project path> ...
      %prog [options] <archive url/path> ...sInstall packages.c
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target_dirtmetavartdirtdefaultthelps�Install packages into <dir>. By default this will not replace existing files/folders in <dir>. Use --upgrade to replace existing packages in <dir> with new versions.s-ds
--downloads--download-dirs--download-directorytdownload_dirs`Download packages into <dir> instead of installing them, regardless of what's already installed.s-Us	--upgradetupgradetactiont
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