screen.blit(picture, tuple(mypoint))
python and tuple
Author
Is there a way I can get my own class to return a tuple to be use in a function automaticly.
ex.
x = myPoint(3,4)
screen.blit(picture,mypoint)
This works, but how do I remove the need to call the tuple function
[Edited by - Zaris on July 4, 2008 12:56:30 PM]
Why do you need a class for points when a tuple is already a nearly ideal container for them? You're going to need to call some function to convert between the class and the tuple
seriously, though...
Any functionality that you might get by methods of a point class can be done with free functions.
class MyPoint: def __init__(new_x, new_y): x = new_x y = new_y def getTuple(): return (x, y)pos = MyPoint(4, 3)screen.blit(picture, pos.getTuple())seriously, though...
pos = (4, 3)screen.blit(picture, pos)Any functionality that you might get by methods of a point class can be done with free functions.
Author
I'm trying to create a point class that will handled internally basic actions needed by a point or vector in a game. I want to be able to override the *,+, - operators and have a type conversion handled automaticly without an explict call to the class function.
Author
I found a solution
I just needed to set up a function to return the length of the object.
class Point(object): def __init__(self, x, y): self.x = x self.y = y def __getitem__(self, index): li = [self.x,self.y] try: return li[index] except IndexError: raise IndexError, "incorrect arg" def __len__(self): return 2I just needed to set up a function to return the length of the object.
Yeah, you don't actually need to return a tuple, you merely need for your type to behave like a tuple. You'll find this often in Python, where constructs don't depend on explicit type information, but rather on interfaces and conformance to a concept.
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