rename existing save

[nananame]

I'd like to enable renaming of existing saved games.
Looking for an easy solution I found renpy.rename_save(old, new)

I thought this would be great but it doesn't seem to work in a simple test. Does anyone have any idea about it?
Here's my test function:

Code: Select all

init python:
    def rename(slot):
        oldname = FileSaveName(slot)
        renpy.rename_save(oldname,"New name test")

As far as I can see it does nothing.Anyone know something about it? Alternativly, if this doesn't work, does anyone have any idea how to implement renaming? I was thinking perhaps getting json of the save and then somehow saving again, but with the modified value...not sure how to go about it though.