Wanted feature Automatically update the suggested filename to save a figure to if a file with the default filename already exists.

Situation now The default interface always suggests figure_1.png filename even when it exists. This means that, each time I want to save a figure, I have to check how many figures I have and update the filename to figure_<number_of_figures+1>.png.

It would be great if It was possible to specify the filename pattern in matplotlibrc file.