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如何合并两个不同的生成器,在每次迭代中,一个不同的生成器将获得收益?如何合并两台发电机?
>>> gen = merge_generators_in_between("ABCD","12")
>>> for val in gen:
... print val
A
1
B
2
C
D
我该如何做到这一点?我在itertools
中找不到它的功能。
如何合并两个不同的生成器,在每次迭代中,一个不同的生成器将获得收益?如何合并两台发电机?
>>> gen = merge_generators_in_between("ABCD","12")
>>> for val in gen:
... print val
A
1
B
2
C
D
我该如何做到这一点?我在itertools
中找不到它的功能。
照照itertools
recipes下循环赛:
>>> from itertools import cycle, islice
>>> def roundrobin(*iterables):
"roundrobin('ABC', 'D', 'EF') --> A D E B F C"
# Recipe credited to George Sakkis
pending = len(iterables)
nexts = cycle(iter(it).next for it in iterables)
while pending:
try:
for next in nexts:
yield next()
except StopIteration:
pending -= 1
nexts = cycle(islice(nexts, pending))
>>> for x in roundrobin("ABCD", "12"):
print x
A
1
B
2
C
D