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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_tohu_items_name(cls):
 """ Return a string which defines the name of the namedtuple class which will be used to produce items for the custom generator. for example: FoobarGenerator -> Foobar QuuxGenerator -> Quux However, it can be set explicitly by the user by defining `__tohu_items_name__` in the class definition, for example: class Quux(CustomGenerator):
 __tohu_items_name__ = 'MyQuuxItem' """

    assert issubclass(cls, TohuBaseGenerator)

    try:
        tohu_items_name = cls.__dict__['__tohu_items_name__']
        logger.debug(f"Using item class name '{tohu_items_name}' (derived from attribute '__tohu_items_name__')")
    except KeyError:
        m = re.match('^(.*)Generator$', cls.__name__)
        if m is not None:
            tohu_items_name = m.group(1)
            logger.debug(f"Using item class name '{tohu_items_name}' (derived from custom generator name)")
        else:
            msg = (
                "Cannot derive class name for items to be produced by custom generator. "
                "Please set '__tohu_items_name__' at the top of the custom generator's "
                "definition or change its name so that it ends in '...Generator'"
            )
            raise ValueError(msg)

    return tohu_items_name