"""
This module contains helper validation functions
to be used with configuration schemas.
"""
import validators
[docs]def is_subclass(parent_kls):
"""
Validator for subclass check.
When we have a class as a value in a validation schema, schema.py will
implicitly try to do an ``isinstance`` check on the
``dict`` to be validated.
Using this function will allow us to do ``issubclass`` checks.
"""
def _validator(kls):
return issubclass(kls, parent_kls)
return _validator
[docs]def has_method(method_name):
"""Validator that checks if a given class has method with the given name"""
def _validator(kls):
return hasattr(kls, method_name) and callable(
getattr(kls, method_name)
)
return _validator
[docs]def is_valid_url(url):
"""Validator that checks if a url is valid"""
return bool(validators.url(url))
[docs]def is_valid_email(email):
"""Validator that checks if an email is valid"""
return bool(validators.email(email))