On Wed, Dec 30, 2009 at 8:39 AM, spir <denis.s...@free.fr> wrote:
> Lie Ryan dixit:
>
>> class Error(Exception):
>> def __init__(self, value):
>> self.value = value
>> def printer(self, value):
>> print self.value
>
> You can also use __str__ instead of printer. This will give a standard output
> form for your error automatically used by print and also, for exceptions,
> when python writes it to stderr: you don't need to catch the error to write
> it yourself.
>
> def __str_(self, value):
> print self.value
Should be
def __str__(self):
return self.value
i.e. __str__() takes just one argument (self) and returns (rather than
prints) a string.
Kent
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