René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Constrained Layout tutorial needs some cleanup....","articleBody":"_Originally posted by @ImportanceOfBeingErnest in https://github.com/matplotlib/matplotlib/pull/12377#issuecomment-426807732_\r\n\r\nThe code does not seem to be runnable and does not give a sensible result. I used this code\r\n\r\n```\r\nfig, axs = plt.subplots(2, 2, constrained_layout=True)\r\nfor ax in axs.flatten()[:-1]:\r\n    ax.plot(np.arange(10))\r\naxs[1, 1].plot(np.arange(10), label='This is a plot')\r\nleg = axs[1, 1].legend(loc='center left', bbox_to_anchor=(0.8, 0.5))\r\nleg.set_in_layout(False)\r\nwanttoprint = True\r\nif wanttoprint:\r\n    leg.set_in_layout(True)\r\n    fig.do_constrained_layout(False)\r\n    fig.savefig('outname.png', bbox_inches='tight')\r\nplt.show()\r\n```\r\n\r\ni.e. the code from the [matplotlib 3.0 documentation](https://matplotlib.org/tutorials/intermediate/constrainedlayout_guide.html#legends) with `wanttoprint = True` but it gives an error `AttributeError: 'Figure' object has no attribute 'do_constrained_layout'`.\r\n\r\nAssuming that what is meant here is `set_constrained_layout`, the problem is that the figure shown deviates from the one obtained via `wanttoprint = False`. So it seems it's not possible to show the figure after saving it?\r\n\r\nUsing the second code (the one with `fig.legend()`) everything works as expected.\r\n\r\nIn my eyes there are the following things to do:\r\n\r\n1. Correct the first code to be runnable and produce the expected outcome for both settings of `wanttoprint` on screen and as saved image.\r\n2. Explain the reasoning behind turning the legend in layout option first off then on etc.\r\n3. Add a savefig line to the second example to make is clear that this is to be understood parallel to the previous example.\r\n","author":{"url":"https://github.com/jklymak","@type":"Person","name":"jklymak"},"datePublished":"2018-10-03T21:36:09.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/12391/matplotlib/issues/12391"}