24 lines
533 B
Python
24 lines
533 B
Python
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class myenumerate:
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def __init__(self, iterable):
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self._iterator = iter(iterable)
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def __iter__(self):
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return myenumerate_iterator(self._iterator)
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class myenumerate_iterator:
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def __init__(self, iterator):
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self._iterator = iterator
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self._index = 0
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def __iter__(self):
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return self
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def __next__(self):
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self._index += 1
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return self._index - 1, self._iterator.__next__()
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a = [10, 20, 30, 40, 50]
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for index, val in myenumerate(a):
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print(index, '=>', val)
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