def test_mapping(value):
    return isinstance(value, mapping_types)
Text array expression.  Returns array of keys.
dataset/ETHPy150Open GeekTrainer/Flask/Work/Trivia - Module 5/env/Lib/site-packages/jinja2/tests.py/test_mapping--crossover with--dataset/ETHPy150Open zzzeek/sqlalchemy/lib/sqlalchemy/dialects/postgresql/hstore.py/HSTORE.Comparator.keys