Python - Check If Multiple String Entries Contain Invalid Chars

Using Python v2.x, I have 3 variables that I want to ask the user for, as below: def Main(): Class_A_Input = int(raw_input('Enter Class A tickets sold: ')) Class_B_Input =

Solution 1:

Calling int on something that isn't a valid integer will raise a ValueError exception. You can just catch that. Or is there some further restriction you want that goes beyond that?

Solution 2:

import sys
try:
    Class_A_Input = int(raw_input('Enter Class A tickets sold: '))
except ValueError:
    print "First input was not a number."
    sys.exit(1)

Will this pattern work for your use case?

Solution 3:

Or you can omit the use of int(), and check the Class_A_input using isdigit()

>>> "asdf1".isdigit()
False
>>> "123".isdigit()
True