https://airflow.apache.org/docs/apache-airflow/stable/configurations-ref.html#store-dag-code

![Captura de pantalla 2021-05-26 a las 17 47 56](https://user-images.githubusercontent.com/11339132/119691160-a2049a00-be4a-11eb-8f55-0ad2c6117620.png)

The Default is True or None?
tests/core/test_configuration.py
"""Test AirflowConfigParser.getfloat"""
        test_config = """
[invalid]
key1 = str
[valid]
key2 = 1.23
"""
        test_conf = AirflowConfigParser(default_config=test_config)
        with pytest.raises(
            AirflowConfigException,
            match=re.escape(
                'Failed to convert value to float. Please check "key1" key in "invalid" section. '
                'Current value: "str".'
            ),
        ):
            test_conf.getfloat('invalid', 'key1')
        assert isinstance(test_conf.getfloat('valid', 'key2'), float)
        assert 1.23 == test_conf.getfloat('valid', 'key2')
    def test_has_option(self):