Python assert 语句

qiuyouzhi

Python assert 语句

语法：

assert expression [, argument]

[size]栗子：

>>> assert True
>>> assert False # 会报错
Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    assert False # 会报错
AssertionError
>>> a = 0
>>> assert a
Traceback (most recent call last):
  File "<pyshell#11>", line 1, in <module>
    assert a
AssertionError
>>> assert (5 == 5)
>>> a = 'q'
>>> assert (a in 'qiuyouzhi'), "错误！"
>>> a = 'f'
>>> assert (a in 'qiuyouzhi'), "错误！"
Traceback (most recent call last):
  File "<pyshell#16>", line 1, in <module>
    assert (a in 'qiuyouzhi'), "错误！"
AssertionError: 错误！

wuqramy

[size]栗子：

这是你帖子中出现的奇怪的标题