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Pillow was pinned for Python 3.5 support, which we no longer need. - https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst - https://facelessuser.github.io/soupsieve/about/changelog/
These directories specify the Python (and system) dependencies for the LMS and Studio. - ``edx`` contains the normal Python requirements files - ``edx-sandbox`` contains the requirements files for Codejail - ``constraints.txt`` is shared between the two (In a normal `OEP-18`_-compliant repository, the ``*.in`` and ``*.txt`` files would be directly in the requirements directory.) .. _OEP-18: https://github.com/edx/open-edx-proposals/blob/master/oeps/oep-0018-bp-python-dependencies.rst