Savefig does not issue a warning on a non-existent keyword n

[ddale]

Original report at SourceForge, opened Tue Feb 8 16:27:19 2011

savefig does not issue a warning on a non-existent keyword name

Example
Savefig('filename.png', NonExistant=True)
Will not throw any warning. This is especially important if you accidentally misspell an argument, such as:
Savefig('filename.png', tranperent=True)
Notice 'transperent' instead of 'transparent'

[pelson]

@ootz0rz: I've had a quick look at your attached commit. I think probably the best approach to resolving this issue would be to go through the backend_*.py files, looking for the cases where **kwargs have been accepted, but not used. For instance, if you remove the **kwargs in backends_agg.py's print_png function, then you might find that Python does the error handling for you for "pngs" at least.

Do you fancy getting involved and seeing how you get on implementing a fix?

[tacaswell]

Started to look into this again, it is a rat's nest.

print_figure throws the kitchen sink at the underlying print functions so if we want to lock this down we need to lock down the union of the keywords expected in all of the print functions.