Basic Exception Handling in Python

PyExcp1.py

def enterANumber ():
    number=int(input ("Enter a number"))
    print (number/2)


""" 
Under try we write code.
Under except errors are handled.
In this example, user may enter 
non numeric inputs which may 
lead to ValueError.
The error is handled in except block as shown below.
If user enters a number such as 123, the method prints
123/2.
Else a value error is thrown and is caught by except
which again prompts user to enter the input.
"""

try:
    enterANumber()
except ValueError:
    print ("Not a Number")
    enterANumber()