def dictionary_validator()

in src/dynamodb_encryption_sdk/internal/validators.py [0:0]

• 14 lines of code
• 5 McCabe index (conditional complexity)

def dictionary_validator(key_type, value_type):
    """Validator for ``attrs`` that performs deep type checking of dictionaries."""

    def _validate_dictionary(instance, attribute, value):
        # pylint: disable=unused-argument
        """Validate that a dictionary is structured as expected.

        :raises TypeError: if ``value`` is not a dictionary
        :raises TypeError: if ``value`` keys are not all of ``key_type`` type
        :raises TypeError: if ``value`` values are not all of ``value_type`` type
        """
        if not isinstance(value, dict):
            raise TypeError('"{}" must be a dictionary'.format(attribute.name))

        for key, data in value.items():
            if not isinstance(key, key_type):
                raise TypeError(
                    '"{name}" dictionary keys must be of type "{type}"'.format(name=attribute.name, type=key_type)
                )

            if not isinstance(data, value_type):
                raise TypeError(
                    '"{name}" dictionary values must be of type "{type}"'.format(name=attribute.name, type=value_type)
                )

    return _validate_dictionary