On 4/1/19 10:12 PM, Irv Kalb wrote:
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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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
Irv,
Thanks for the response! I realize the code is junk - just done to
illustrate the problem.
Dave,
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