A subpackage with modules for various GUI libraries and output formats.

The base matplotlib namespace includes:

    `~matplotlib.rcParams`
        Default configuration settings; their defaults may be overridden using
        a :file:`matplotlibrc` file.

    `~matplotlib.use`
        Setting the Matplotlib backend.  This should be called before any
        figure is created, because it is not possible to switch between
        different GUI backends after that.

The following environment variables can be used to customize the behavior::

    .. envvar:: MPLBACKEND

      This optional variable can be set to choose the Matplotlib backend. See
      :ref:`what-is-a-backend`.

    .. envvar:: MPLCONFIGDIR

      This is the directory used to store user customizations to
      Matplotlib, as well as some caches to improve performance. If
      :envvar:`MPLCONFIGDIR` is not defined, :file:`{HOME}/.config/matplotlib`
      and :file:`{HOME}/.cache/matplotlib` are used on Linux, and
      :file:`{HOME}/.matplotlib` on other platforms, if they are
      writable. Otherwise, the Python standard library's `tempfile.gettempdir`
      is used to find a base directory in which the :file:`matplotlib`
      subdirectory is created.

Matplotlib was initially written by John D. Hunter (1968-2012) and is now
developed and maintained by a host of others.

Occasionally the internal documentation (python docstrings) will refer
to MATLABĀ®, a registered trademark of The MathWorks, Inc.

é