Opens the topic-keyword map resource file and returns the corresponding python dictionary.

    - Input:  - file_path: The path pointing to the topic-keyword map resource file.

    - Output: - topic_set: A topic to keyword python dictionary.

def get_topic_keyword_dictionary():
    """
    Opens the topic-keyword map resource file and returns the corresponding python dictionary.

    - Input:  - file_path: The path pointing to the topic-keyword map resource file.

    - Output: - topic_set: A topic to keyword python dictionary.
    """
    topic_keyword_dictionary = dict()
    file_row_gen = get_file_row_generator(get_package_path() + "/twitter/res/topics/topic_keyword_mapping" + ".txt",
                                          ",",
                                          "utf-8")
    for file_row in file_row_gen:
        topic_keyword_dictionary[file_row[0]] = set([keyword for keyword in file_row[1:]])

    return topic_keyword_dictionary