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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 _update_with_merge_lists(self, other, key, val=None, **options):
 """ Similar to _update_with_merge but merge lists always. :param self: mapping object to update with 'other' :param other: mapping object to update 'self' :param key: key of mapping object to update :param val: value to update self alternatively :return: None but 'self' will be updated """

    _update_with_merge(self, other, key, val=val, merge_lists=True, **options)