python assert 断言基本用法

assert 关键字用于在代码中设置检查点，用于当程序出现错误时中断程序执行。>>> a = 3>>> assert 0 < a < 10>>> a = 20>>> assert 0 < a <10Traceback (most recent call last):  File "<pyshell#3>", line 1, in <module>    assert 0 < a <10AssertionError# assert 条件后可以增加错误信息解释>>> a = 20>>> assert 0 < a < 10, '超出范围！'Traceback (most recent call last):  File "<pyshell#5>", line 1, in <module>    assert 0 < a < 10, '超出范围！'AssertionError: 超出范围！