Am 25.10.2012 09:21 schrieb Thomas Rachel:
I think
# iterate ad inf., because partial never returns None:
i1 = iter(partial(randrange, n), None)
# take the next value, make it None for breaking:
i2 = (j if j in selected else None for j in i1)
# and now, break on None:
i3 = iter(lambda: next(i2), None)
would do the job.
But, as I read it now again, it might be cleaner to create an own
generator function, such as
def rand_values(randrange, n, selected):
# maybe: selected = set(selected) for the "not in"
while True:
val = partial(randrange, n)
if val not in selected: break
yield val
for value in rand_values(...):
or, for the general case proposed some posings ago:
def while_values(func, *a, **k):
while True:
val = func(*a, **k):
if not val: break
yield val
Thomas
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