> On Apr 1, 2019, at 7:02 PM, Dave <dbola...@offilive.com> wrote:
>
> As classes get more complex, it is good to call a function to do some of the
> processing, and make the code easier to follow. My question is how to do
> that? I've attached some silly code to illustrate the point. The error is:
> name 'validScale' is not defined. Well, yes it is, but maybe not the correct
> way. Suggestions?
>
> Dave,
>
> class TempConverter():
> """ Temperature Converter converts a tempeature from one scale
> to another scale. For example: 32, F, C will return
> 0 degrees C
> """
>
> def __init__(self, temperature, scale, newScale):
> self.temperature = temperature
> self.scale = scale
> self.newScale = newScale
>
> def validScale(self, scaleName):
> if scaleName.upper == 'F' or 'C' or 'K':
> return True
> else:
> return False
>
> def convertTemp(self):
> """ Converts temperature scale if scales valid."""
> if validScale(self.scale):
> scaleValid = True
> if validScale(self.newScale):
> newScaleValid = True
> if scaleValid and newScaleValid:
> print('Scale converted')
> else:
> msg = "There was and error with the scales entered.\n"
> msg = msg + "You entered: " + self.scale
> msg = msg + ' ' 'and' + self.newScale
> print(msg)
>
> if __name__ == "__main__":
> myclass = TempConverter(32, 'f', 'c')
> myclass.convertTemp()
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> https://mail.python.org/mailman/listinfo/python-list
>
To answer your specific question, you call a method in the same class by
calling: self.methodName For example: self.validScale
However, once you fix that, you wind find that the if statement in that method
is not built correctly.
Also, since the variable self.scale is already set in your __init__ method,
there is no need to pass it into your function. You could just use self.scale
inside that method.
Irv
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