def check_status(status):
    """ A little helper function that checks an API error code and returns a nice message.
        Returns None if no errors found """
    if status == 'REQUEST_DENIED':
        return 'The geocode API is off in the Google Developers Console.'
    elif status == 'ZERO_RESULTS':
        return 'No results found.'
    elif status == 'OVER_QUERY_LIMIT':
        return 'The geocode API quota has run out.'
    elif status == 'UNKNOWN_ERROR':
        return 'Unknown Error.'
    elif status == 'INVALID_REQUEST':
        return 'Invalid Request.'
    elif status == 'OK':
        return None
