On 11-Mar-12 20:03, Steven D'Aprano wrote:
On Sun, Mar 11, 2012 at 07:02:11PM -0700, Michael Lewis wrote:
Why do I have to use "self.example" when calling a method inside a class?
For example:
def Play(self):
'''find scores, reports winners'''
self.scores = []
for player in range(self.players):
print
print 'Player', player + 1
self.scores.append(self.TakeTurns())
I have another method called take turns (not shown for brevity purposes).
When I want to call it, why can't I just call it like a function and use
TakeTurns() instead of self.TakeTurns()?
Steven's notes about scoping rules are one reason. Another is the
matter of object instance binding. When you call a method, you're not
just calling a regular function. You're calling a function bound to a
particular object, so by saying self.TakeTurns(), Python knows that the
object "self" is invoking that method, not some other instance of the
Play class. That method then can access all of that specific object's
attributes as necessary.
--
Steve Willoughby / st...@alchemy.com
"A ship in harbor is safe, but that is not what ships are built for."
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