python如何实现无限循环

var = 1
while var == 1 : # 该条件永远为true，循环将无限执行下去
 
num = raw_input("Enter a number :")
 
print "You entered: ", num 
print "Good bye!"

class Infinit:
 def __iter__(self):
 return self
 def __next__(self):
 return None
for i in Infinit():
 print("好嗨哟,你是不是学会了Python的无限循环!")
print("我是永远不会执行到的")