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packages that are not available in PyPI, or want to give your users an
alternate download location, you can add a 'find_links' option to the
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setuptools will scan the listed web pages for links that satisfy the
requirements.
'extras_require' -- a dictionary mapping names of optional "extras" to the
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this::
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indicates that the distribution can optionally provide an extra
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objects. Features are a portion of the distribution that can be
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from all setup commands, including source and binary distributions, so
you can create multiple distributions from the same source tree.
Feature names should be valid Python identifiers, except that they may
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'test_suite' -- the name of a test suite to run for the 'test' command.
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location as the package. Note that globs are allowed to reference
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'description' -- a short, human readable description of the feature, to
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'available' -- if true, the feature is available for installation on the
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'optional' -- if true, the feature's inclusion can be controlled from the
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