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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 get_additional_handlers():
 """ Returns the actual functions from the dotted paths specified in ADDITIONAL_HANDLERS. """

    global _additional_handlers
    if not isinstance(_additional_handlers, list):
        handlers = []
        for name in config.ADDITIONAL_HANDLERS:
            module_name, function_name = name.rsplit('.', 1)
            function = getattr(import_module(module_name), function_name)
            handlers.append(function)
        _additional_handlers = handlers
    return _additional_handlers