[Tutor] Explain

[Bob Gailer]

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At 04:32 PM 3/3/2003 -0500, Pete Versteegen wrote:
>--------------------------
>#!/usr/bin/python
>class Single:
>
>     def ___init___(self, maxmonths):
>         self.size = []
>         self.n = maxmonths
>         for i in range(0, self.n):
>             self.size.append = 0.0
>
>if __name__ == '__main__':
>     unitsize = Single(20)
>     unitsize.size[10] = 500.
>     print unitsize.size
>
>-----------------------------
>Traceback (most recent call last):
>   File "./Single.py", line 11, in ?
>     unitsize = Single(20)
>TypeError: this constructor takes no arguments

Count the underscores around init. There should be 2 before and 2 after. 
After you fix that you will get another exception:

     self.size.append = 0.0
AttributeError: 'list' object attribute 'append' is read-only

Correct syntax is: self.size.append(0.0)

Bob Gailer
mailto:ramrom@earthling.net
303 442 2625

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