Python中的assert语句的使用_python assert 0

Python 3.7.4 (tags/v3.7.4:e09359112e, Jul  8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)] on win32
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>>> age = 10
>>> assert 0 < age < 100
>>> age = -1
>>> assert 0 < age < 100
Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    assert 0 < age < 100
AssertionError
>>> 
>>> age = 10
>>> assert 0 < age < 100 , "年龄输入错误!!!"
>>> 
>>> age = -10
>>> assert 0 < age < 100 , "年龄输入错误!!!"
Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    assert 0 < age < 100 , "年龄输入错误!!!"
AssertionError: 年龄输入错误!!!
>>> age = 210
>>> assert 0 < age < 100 , "年龄输入错误!!!"
Traceback (most recent call last):
  File "<pyshell#11>", line 1, in <module>
    assert 0 < age < 100 , "年龄输入错误!!!"
AssertionError: 年龄输入错误!!!
>>> 
>>> 
>>> 
>>> 
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