pylabtools.py 文件源码

def activate_matplotlib(backend):
    """Activate the given backend and set interactive to True."""

    import matplotlib
    matplotlib.interactive(True)

    # Matplotlib had a bug where even switch_backend could not force
    # the rcParam to update. This needs to be set *before* the module
    # magic of switch_backend().
    matplotlib.rcParams['backend'] = backend

    import matplotlib.pyplot
    matplotlib.pyplot.switch_backend(backend)

    # This must be imported last in the matplotlib series, after
    # backend/interactivity choices have been made
    import matplotlib.pyplot as plt

    plt.show._needmain = False
    # We need to detect at runtime whether show() is called by the user.
    # For this, we wrap it into a decorator which adds a 'called' flag.
    plt.draw_if_interactive = flag_calls(plt.draw_if_interactive)