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英文文档: sum(iterable[, start]) Sums start and the items of an iterable from left to right and returns the total. start defaults to 0. The iterable‘s ite 阅读全文
posted @ 2016-11-17 08:59
十月狐狸
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英文文档: class str(object='') class str(object=b'', encoding='utf-8', errors='strict') Return a string version of object. If object is not provided, retu 阅读全文
posted @ 2016-11-17 08:53
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