pylab.py 文件源码

def pylab(self, line=''):
        """Load numpy and matplotlib to work interactively.

        This function lets you activate pylab (matplotlib, numpy and
        interactive support) at any point during an IPython session.

        %pylab makes the following imports::

            import numpy
            import matplotlib
            from matplotlib import pylab, mlab, pyplot
            np = numpy
            plt = pyplot

            from IPython.display import display
            from IPython.core.pylabtools import figsize, getfigs

            from pylab import *
            from numpy import *

        If you pass `--no-import-all`, the last two `*` imports will be excluded.

        See the %matplotlib magic for more details about activating matplotlib
        without affecting the interactive namespace.
        """
        args = magic_arguments.parse_argstring(self.pylab, line)
        if args.no_import_all is None:
            # get default from Application
            if Application.initialized():
                app = Application.instance()
                try:
                    import_all = app.pylab_import_all
                except AttributeError:
                    import_all = True
            else:
                # nothing specified, no app - default True
                import_all = True
        else:
            # invert no-import flag
            import_all = not args.no_import_all

        gui, backend, clobbered = self.shell.enable_pylab(args.gui, import_all=import_all)
        self._show_matplotlib_backend(args.gui, backend)
        print ("Populating the interactive namespace from numpy and matplotlib")
        if clobbered:
            warn("pylab import has clobbered these variables: %s"  % clobbered +
            "\n`%matplotlib` prevents importing * from pylab and numpy"
            )