kopia lustrzana https://github.com/micropython/micropython-lib
48 wiersze
963 B
Python
48 wiersze
963 B
Python
def count(start=0, step=1):
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while True:
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yield start
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start += step
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def cycle(p):
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try:
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len(p)
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while p:
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yield from p
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except TypeError:
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# len() is not defined for this type. Assume it is
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# a finite iterable so we must cache the elements.
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cache = []
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for i in p:
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yield i
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cache.append(i)
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while cache:
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yield from cache
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def repeat(el, n=None):
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if n is None:
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while True:
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yield el
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else:
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for i in range(n):
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yield el
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def chain(*p):
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for i in p:
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yield from i
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def islice(p, start, stop=(), step=1):
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if stop == ():
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stop = start
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start = 0
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while True:
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try:
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yield p[start]
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except IndexError:
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return
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start += step
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if start >= stop:
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return
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def tee(iterable, n=2):
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return [iter(iterable)] * n
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