Sep 9, 2015 · Sep 9, 2015
diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
 _IP_REGISTERED = None
 _INSTALL_FIG_OBSERVER = False


 def install_repl_displayhook():
    """
    Install a repl display hook so that any stale figure are automatically
    # see if we have IPython hooks around, if use them

    try:
        from IPython import get_ipython
        ip = get_ipython()
        if ip is None:
            raise _NotIPython()

        if _IP_REGISTERED:
            return

        def post_execute():
            if matplotlib.is_interactive():
                draw_all()

        # IPython >= 2
        try:
            ip.events.register('post_execute', post_execute)
        except AttributeError:
            # IPython 1.x
            ip.register_post_execute(post_execute)

        _IP_REGISTERED = post_execute
        _INSTALL_FIG_OBSERVER = False
        if 'IPython' in sys.modules:
            from IPython import get_ipython
            ip = get_ipython()
            if ip is None:
                raise _NotIPython()

            if _IP_REGISTERED:
                return

            def post_execute():
                if matplotlib.is_interactive():
                    draw_all()

            # IPython >= 2
            try:
                ip.events.register('post_execute', post_execute)
            except AttributeError:
                # IPython 1.x
                ip.register_post_execute(post_execute)

            _IP_REGISTERED = post_execute
            _INSTALL_FIG_OBSERVER = False
        else:
            _INSTALL_FIG_OBSERVER = True

    # import failed or ipython is not running
    except (ImportError, _NotIPython):
Original file line number	Diff line number	Diff line change
Expand Up		@@ -112,6 +112,7 @@ def _backend_selection():
		_IP_REGISTERED = None
		_INSTALL_FIG_OBSERVER = False


		def install_repl_displayhook():
		"""
		Install a repl display hook so that any stale figure are automatically
Expand All		@@ -128,27 +129,30 @@ class _NotIPython(Exception):
		# see if we have IPython hooks around, if use them

		try:
		from IPython import get_ipython
		ip = get_ipython()
		if ip is None:
		raise _NotIPython()

		if _IP_REGISTERED:
		return

		def post_execute():
		if matplotlib.is_interactive():
		draw_all()

		# IPython >= 2
		try:
		ip.events.register('post_execute', post_execute)
		except AttributeError:
		# IPython 1.x
		ip.register_post_execute(post_execute)

		_IP_REGISTERED = post_execute
		_INSTALL_FIG_OBSERVER = False
		if 'IPython' in sys.modules:
		from IPython import get_ipython
		ip = get_ipython()
		if ip is None:
		raise _NotIPython()

		if _IP_REGISTERED:
		return

		def post_execute():
		if matplotlib.is_interactive():
		draw_all()

		# IPython >= 2
		try:
		ip.events.register('post_execute', post_execute)
		except AttributeError:
		# IPython 1.x
		ip.register_post_execute(post_execute)

		_IP_REGISTERED = post_execute
		_INSTALL_FIG_OBSERVER = False
		else:
		_INSTALL_FIG_OBSERVER = True

		# import failed or ipython is not running
		except (ImportError, _NotIPython):
Expand Down