airflow/contrib/hooks/bigquery_hook.py
def _validate_value(key, value, expected_type):
    """ function to check expected type and raise
    error if type is not correct """
    if not isinstance(value, expected_type):
        raise TypeError("{} argument must have a type {} not {}".format(
            key, expected_type, type(value)))
def _validate_value(key, value, expected_type):
    """ function to check expected type and raise
    error if type is not correct """
    if not isinstance(value, expected_type):
        raise TypeError("{} argument must have a type {} not {}".format(
            key, expected_type, type(value)))
function to check expected type and raise
    error if type is not correct