Using excpetions to allow *some* user errors
Exceptions example from a Well House Consultants training course
More on Exceptions [link]
Source code: gwrong.py Module: Y109
""" What should you do if a user answers a question incorrectly?
Typically, you should ask the question again; exiting from the
program is not a good idea if this is part of a long sequence of
questions. However, there will be a limit as to how many time you'll
want to reject and reprompt.
This example shows a question that's going to be repeated is the user's
entry throws and excpetion - but only up to a certain number of times (5).
In this case, an assumption is then made ... """
twitcount = 0
patience = 5
while twitcount < patience:
value = raw_input("How old are you ")
retire = 55 - int(value)
print "You can retire in",retire,"years"
print "Didn't follow that"
print "want a number you twit!"
twitcount += 1
retire = 0
print "we are chuckin you out NOW"
print "We have",retire,"pension planning years"
Learn about this subject
This module and example are covered on the following public courses:
* Learning to program in Python
* Python Programming
* Intermediate Python
Also available on on site courses for larger groups
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