“Before you die, there is something you should know about us, Lone-Star…”
def unfoldFilter(unfoldFunction, filterFunction, iterable):
for item in iterable:
for result in unfoldFunction(item):
if filterFunction is None or apply(filterFunction, [result]):
yield result
assert darkHelmet in unfoldFilter(lambda p: p.roommates, lambda p: p.isFormer(),
unfoldFilter(lambda p: p.children, None,
unfoldFilter(lambda p: p.siblings, None,
unfoldFilter(lambda p: p.parents, None,
unfoldFilter(lambda p: p.children, lambda p: p.isMale(),
unfoldFilter(lambda p: p.siblings, None,
unfoldFilter(lambda p: p.siblings, lambda p: p.isMale(),
unfoldFilter(lambda p: p.parents, lambda p: p.isMale(), list(loneStar))
)
)
)
)
)
)
assert makesThem(darkHelmet, loneStar) is None
For those who don’t get the joke, the movie “Spaceballs” self-parodied itself with a series of whimsical merchandising options and contained a gag referencing Star Wars’ iconic “I am your father”, except… well, a little more complex.
