[Tutor] Classes

[Michael Janssen]

On Tue, 25 Feb 2003, Kenneth Boehme wrote:

>  class Circle:
>         def _init_(self, rad=5):
>                 self.radius=rad
>
[...]
> >>> y=Circle(10)
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> TypeError: this constructor takes no arguments
> >>>
>
> What I'm doing wrong?

two underscores: __init__(self, rad=5) . Now Python knows what to do with
this __init__() (and take it as the constructor). In your case _init_() is
a normal method and y hasn't a __init__() operator.

Michael

>
> Thanks,
>
> Kenneth