Try /Exception in Function Python

Question

just started playing with python came across a little problem simple example area of square with exception handling for wrong input works when integers are correctly input --but should I input and string or char-I get Traceback (most recent call last): File "ex3.py", line 29, in area = width * length TypeError: unsupported operand type(s) for *: 'NoneType' and 'int'

#!/usr/bin/python

def error():
        print "no parameter entered - please enter parameter"

def get_width():
        width = None
        try:
                width = int(raw_input("please enter width of the room in meters: "))
                return width
        except:
                error()
                get_width()

def get_length():
        length = None
        try:
                length = int(raw_input("please enter length of the room in meters: "))
                return length

        except:
                error()
                get_length()

print "\nExercise 3: Area of a Room"

width = get_width()
length = get_length()
area = width * length

print "The area of a room with a width of "+str(width)+" and a length of "+str(length)+" is "+str(area)+" squared meters\n"

any help/explanation would be great thanks

TigerhawkT3 · Accepted Answer · 2015-11-25 04:39:47Z

1

You make a recursive call, but the result isn't going anywhere. You need to return it. For example:

return get_width()

answered Nov 25, 2015 at 4:39

TigerhawkT3

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1 Comment

ThatsStrange Over a year ago

AH! ..awesome thankyou! - it works , but only half understand, i use the function recursively yes, woudnt the return width handle the result of this call too?

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