On Wed, Jan 28, 2009 at 2:18 PM, Yanom Mobis <[email protected]> wrote:
> this is the code in question:
>
> class Car(Basicsprite): #car class
> def __init__(self, speedarg=(0,0)):
> self.speed = speedarg
> Basicsprite.__init__(self)
> def move(self, speedv=self.speed):
> self.rect = self.rect.move(speedv)
>
>
> however, when I try to import that class from python:
>
>
>
> >>> from basicsprite import Car
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "basicsprite.py", line 14, in <module>
> class Car(Basicsprite): #car class
> File "basicsprite.py", line 18, in Car
> def move(self, speedv=self.speed):
> NameError: name 'self' is not defined
>
>
>
> how can self not be defined??
>
>
>
> This line contains your error.
> def move(self, speedv=self.speed):
At the time the default arguments are evaluated (at the time of function
definition), self - your instance - is not defined.
Try something along these lines instead:
def move(self, speedv=None):
if speedv is None:
speedv = self.speed
