def check_string_dict()

in firebase_admin/_messaging_encoder.py [0:0]

• 12 lines of code
• 10 McCabe index (conditional complexity)

    def check_string_dict(cls, label, value):
        """Checks if the given value is a dictionary comprised only of string keys and values."""
        if value is None or value == {}:
            return None
        if not isinstance(value, dict):
            raise ValueError('{0} must be a dictionary.'.format(label))
        non_str = [k for k in value if not isinstance(k, str)]
        if non_str:
            raise ValueError('{0} must not contain non-string keys.'.format(label))
        non_str = [v for v in value.values() if not isinstance(v, str)]
        if non_str:
            raise ValueError('{0} must not contain non-string values.'.format(label))
        return value