<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def skip_redundant(iterable, skipset=None):
 """ Redundant items are repeated items or items in the original skipset. """

    if skipset is None:
        skipset = set()
    for item in iterable:
        if item not in skipset:
            skipset.add(item)
            yield item