enumerate()函數是會返回index（下標）和value（值）的函數 實際上，enumerate()在每次循環中，返回的是一個包含兩個元素的定值表(tuple)，兩個元素分別賦予index和value。
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"""Docstring:enumerate(iterable[, start]) -> iterator for index, value of iterableReturn an enumerate object. iterable must be another object that supportsiteration. The enumerate object yields pairs containing a count (fromstart, which defaults to zero) and a value yielded by the iterable argument.enumerate is useful for obtaining an indexed list: (0, seq[0]), (1, seq[1]), (2, seq[2]), ...Type: type"""新聞熱點
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