def _create_query_dict(query_text):
    """
    Create a dictionary with query key:value definitions
    query_text is a comma delimited key:value sequence
    """
    query_dict = dict()
    if query_text:
        for arg_value_str in query_text.split(','):
            if ':' in arg_value_str:
                arg_value_list = arg_value_str.split(':')
                query_dict[arg_value_list[0].strip()] = arg_value_list[1].strip()

    return query_dict