set_window_title?

[paugier]

I'd like to change the default file name when saving a figure.

I tried with ax.figure.canvas.set_window_title(new_name), but

1. the window title is not correctly changed and

2. the default saving name is always "Figure n".

[tacaswell]

Can you please tell us what version of mpl, ~what backend~, and what version of Python you are using? Can you also give us a complete, but minimal, example of what you tried that did not work? There is a lot of state associated with GUI windows so the closer we can get to recreating exactly what is going wrong for you the easier it will be to debug.

[tacaswell]

I failed at reading and thought this was an issues against core Matplotlib :sheep: . in this case the backend you are using is clear from context, but a minimal example is still very helpful.

[paugier]

I tried something very simple:

%matplotlib widget
import matplotlib.pyplot as plt
fig, ax = plt.subplots()
fig.canvas.set_window_title("new name")

With

$ jupyter --version                       
jupyter core     : 4.6.3
jupyter-notebook : 6.0.3
qtconsole        : 4.7.3
ipython          : 7.18.1
ipykernel        : 5.2.1
jupyter client   : 6.1.3
jupyter lab      : 2.2.2
nbconvert        : 5.6.1
ipywidgets       : 7.5.1
nbformat         : 5.0.6
traitlets        : 4.3.3
$ python --version                        
Python 3.8.2
$ pip show matplotlib                     
Name: matplotlib
Version: 3.3.2

[paugier]

Note that it seems that the window title is reset to Figure 1 at the end of the notebook or when the figure is plotted because if I execute again fig.canvas.set_window_title("new name") (after the first execution of the notebook) the title is correctly changed.

[tacaswell]

That sounds like there is some state which is getting out of sync and then getting "fixed". Both the Figure and the Manager have a notion of what the name is....