TypeError: '<' not supported between instances of 'str' and 'int'

 

< does not support comparison between str instances and int instances

 

birth is of type str

2000 is of type int

Therefore, it cannot be compared, and an error is reported

 

1 birth = input('birth: ')
2 if birth < 2000:
3     print('00前')
4 else:
5     print('00后')

 

change into:

 

1 s = input('birth: ')
2 birth = int(s)
3 if birth < 2000:
4     print('00前')
5 else:
6     print('00后')