1 from pydantic import BaseModel, conint, ValidationError
 2 
 3 
 4 class NumVerify(BaseModel):
 5     # 限定范围
 6     expected_number: conint(ge=0, le=100)
 7 
 8 
 9 def input_number():
10     while True:
11         number = input(">>请输入:")
12         try:
13             number_input = NumVerify(expected_number=number)
14         except ValidationError as e:
15             print(e)
16             continue
17         else:
18             number = number_input.expected_number
19             break
20     print(">>your number is {}".format(number))
21 
22 
23 if __name__ == '__main__':
24     input_number()