# -*- coding: utf-8 -*-

#python 27

#xiaodeng

#Python学习手册 868

#assert语句(assert用来判断语句的真假)

#案例

mylist=['item']

assert len(mylist)>=1

mylist.pop()

assert len(mylist)>=1

#

'''

Traceback (most recent call last):

  File "C:\Users\Administrator\Desktop\my.py", line 12, in <module>

    assert len(mylist)>=2

AssertionError

'''