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How to Install
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From source
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``dust_extinction`` can be installed from the source code in the normal
python fashion after downloading it from the git repo::

    python setup.py install

Using pip
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``dust_extinction`` can also be installed using pip::

    # from PyPI
    pip install dust_extinction

    # if you already have an older version installed
    pip install --upgrade dust_extinction

    # from the master trunk on the repository, considered developmental code
    pip install git+https://github.com/karllark/dust_extinction.git