Idea about method parameters

[Markus Schaber]

Hello,

Kirill Simonov <kirill at xyz.donetsk.ua> schrub:

> On Tue, Sep 25, 2001 at 11:31:18AM +0200, Markus Schaber wrote:
>> class Tankung:
>>   def __init__(Liter, # the amount of fuel
> 
> You forgot "self" here.

That's correct - you may call me fool :-)

[...]

> How about this:
> 
> class Tankung:
>     def __init__(self,
> Liter, # set the fuel
>                  Datum, # set the date
>                  Preis, # set the price
>                  Tachostand, # the kilometer count
>                  Waehrung, # DM or Euro?
>                  Tankstelle, # where was it bought
>                  Bemerkung= "", # any remarks?
>                  prev = None) # the previous one, omit for first in
>                  chain
>        self.bind(locals())
>        self.Tachostand = int(Tachostand) # ensure the kilometer count
>        is
>                                          # an integer
>        try: # build the chained list
>            self.prev.next = self
>       except TypeError:
>            pass # prev was None or alike
> 
>     def bind(self, keywords):
>         for name, value in keywords.items():
>             if not (self is value):
>                 setattr(self, name, value)
> 

It looks much like the solution of Wolfgang Grafen, except that you do 
a dict.update() by hand and thus avoid having to delete the self 
afterwards.

And it has the same problem. It works with Tachostand here (because it 
is overwritten anyway) but won't work as soon as you have any parameter 
that is only used in calculations, and not assigned to an attribute (or 
you need a long exception list in the if in bind()).

markus

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