Failing optionally adapt test case

adapt_optionally_regex.py

from adapt.intent import IntentBuilder
from adapt.engine import IntentDeterminationEngine


def check_for_location(intent):
    if 'Location' in intent:
        print('Location: {}'.format(intent['Location']))
    else:
        print('Location: Not found')


e = IntentDeterminationEngine()

print('Registering weather skill entities')
# Weather Keywords
e.register_entity('what is', 'Query', None)
e.register_entity('weather', 'Weather', None)
e.register_regex_entity('(at|in) (?P<Location>.+)')

print('Registering Current weather intent')

# Registering current weather intent
i = IntentBuilder("CurrentWeatherIntent").require(
                  "Weather").optionally("Location").build()
e.register_intent_parser(i)

print('TESTING "what is the weather like in stockholm"')
best_intent = next(e.determine_intent("what is the weather like in stockholm",
                                      100, include_tags=True))
check_for_location(best_intent)

print('\nRegistering additional regexes...')
# Register additonal regexes
e.register_regex_entity('(read (out )?)?((status|state|value|sensor) )?(?P<Entity>.*)')

print('TESTING "what is the weather like in stockholm"')
best_intent = next(e.determine_intent("what is the weather like in stockholm",
                                      100, include_tags=True))
check_for_location(best_intent)