“схема” Ответ

схема

from schema import Schema, And, Use, Optional, SchemaError

schema = Schema([{'name': And(str, str.strip),
                  'age':  And(Use(int), lambda n: 18 <= n <= 99),
                  Optional('gender'): And(str, Use(str.lower), lambda s: s in ('squid', 'kid'))}])

data = [{'name': 'Codecaine', 'age': '28', 'gender': 'Squid'},
        {'name': 'Sam', 'age': '42'},
        {'name': 'Sacha', 'age': '20', 'gender': 'KID'}]

try:
    validated = schema.validate(data)
    print(validated)
except SchemaError as err:
    print(err)