schema_library_data_validation_quickstart_example.py

1from schema import Schema, And, Use, Optional, SchemaError
2
3schema = Schema({
4    'email': And(str, len, lambda s: '@' in s),
5    'age': And(Use(int), lambda n: 18 <= n <= 99),
6    Optional('gender'): And(str, Use(str.lower), lambda s: s in ('male', 'female'))
7})
8
9data = {
10    'email': 'nathan@python.org',
11    'age': '31',
12    'gender': 'MALE'
13}
14
15try:
16    validated = schema.validate(data)
17    print(validated)
18except SchemaError as e:
19    print(e)