Anton Vredegoor wrote:
> Maybe this one is better?
No, this one keeps generating output.
But this one stops at least:
from collections import deque
from itertools import chain, repeat
def xsplitter(seq, pred):
Q = deque(),deque()
sentinel = object()
it = chain(seq,repeat(sentinel))
def gen(p):
for x in it:
if x is sentinel:
while Q[p]: yield Q[p].popleft()
break
elif pred(x) == p:
while Q[p]: yield Q[p].popleft()
yield x
else:
Q[~p].append(x)
for x in gen(p): yield x
return gen(1),gen(0)
def test():
L = 1, 2, 3, 'a', 'a'
# L = 'a', 1, 2, 'a'
# L = 1, 'a', 3, 'a', 4, 5, 6, 'a'
it1, it2 = xsplitter(L, lambda x: x == 'a')
print it1.next()
print it2.next()
print it1.next()
print it2.next()
if __name__=='__main__':
test()
Are there any other cases this doesn't cover?
A.
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