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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def init_dispatcher_logger():
 """ Initialize dispatcher logging configuration"""

    logger_file_path = 'dispatcher.log'
    if dispatcher_env_vars.NNI_LOG_DIRECTORY is not None:
        logger_file_path = os.path.join(dispatcher_env_vars.NNI_LOG_DIRECTORY, logger_file_path)
    init_logger(logger_file_path, dispatcher_env_vars.NNI_LOG_LEVEL)