Python中无限循环有什么条件

#!/usr/bin/python

# -*- coding: UTF-8 -*-

var = 1

while var == 1 : # 该条件永远为true，循环将执行下去

  num = raw_input("Enter a number :")

  print "You entered: ", num

print "Good bye!"

Enter a number :20

You entered: 20

Enter a number :29

You entered: 29

Enter a number :3

You entered: 3

Enter a number between :Traceback (most recent call last):

 File "test.py", line 5, in <module>

  num = raw_input("Enter a number :")

KeyboardInterrupt

</module>

>>> True = 10