Reverse a number string in Python

#programme to reverse a number string
num=int(raw_input("Enter number :  "))
#input from user
c=0
while num>0 :
    c=c*10+num%10
    num=num/10

print "Reverse number is :  ",c   

1.Enter number to reverse
2.It will show reverse number
Environment used : Ubuntu
Python : python 2.x or 3.x