pickAFile Question!

[s34n23]

How would I make it that if I opened pickAFile, that if cancel is pressed in the pickAFile() dialogue box, I want to ask the user if it was a mistake. If it was a mistake, open the pickAFile() dialogue again, and repeat until it is either not a mistake, or a picture file was selected.

Thanks so much in advance!

I have this down, it's not much but its a start...

def exampleA():
  file = pickAFile() 
  picture = makePicture(file)
  show(picture)

[dwblas]

What does pickAFile return when cancel is pressed? If it is None then you can use something like

def exampleA():
    mistake = True
    while mistake:
        file = pickAFile() 
        if file==None:
            mistake=ask_if_mistake() ## returns True or False
        else:
            picture = makePicture(file)
            show(picture)
            mistake=False

[s34n23]

If a picture file is selected, I want it to return the 'made' picture, otherwise if cancel was pushed and the user indicated that it was NOT a mistake to return an error message.