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ryanostenPHP Development Techdegree Student 29,615 Points
It looks to me like adding the 'as err' code on the exception results in ugly error if you enter a string instead of int
Now instead of 'Thats not a valid value', you get:
'Oh no thats not a valid value. Try again... could not convert string to float: 'whatever your string was'
Second line is ugly and confusing to a user. How would you cover this? You don't know what the err will be, so simply printing it out can be risky.
Alexander Davison65,469 Points
You could catch a specific kind of error like so:
try: # ... code goes here ... except ValueError: print('Oh no that is not a number!')
The fourth line is only executed if the code in the
try block causes a
ValueError. Python returns a
ValueError when you try to run something like