On Jun 17, 12:36 pm, Lie <[EMAIL PROTECTED]> wrote: > On Jun 17, 10:50 am, [EMAIL PROTECTED] wrote: > > > > > I'm writing to see calcuration process. > > And so, I can't catch StopIteration... > > > What is mistake? > (snip) > > In a for-loop, StopIteration is caught by the for-loop for your > convenience (so you don't need to set up try-except of your own) (snip)
To clarify, when the for-loop catches StopIteration, the for-loop quits and stop looping, continuing to the next statement after the loop block. To be more accurate, in your case, the StopIteration is caught by the enumerate() when it is enumerating collatz. The for-loop then loops the generator expression returned by enumerate, when enumerate runs out of things to return (i.e. when enumerate caught StopIteration raised by collatz), enumerate raise StopIteration which is caught by the for-loop. > PS: btw, you can't write 'print last.append(1)' because list > operations like append doesn't return itself. To clarify, list append returns 'None' which, in python, means it is a method/sub. In actuality, python doesn't recognize the difference between method and function. -- http://mail.python.org/mailman/listinfo/python-list
