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1.如何实现可迭代对象和迭代器对象(1)¶ In [1]: # 列表和字符串都是可迭代对象 l = [1,2,3,4] In [2]: s = 'abcde' In [3]: for x in l:print(x) 1 2 3 4 In [4]: for x in s:print(x) a b c 阅读全文
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１.如何在列表, 字典, 集合中根据条件筛选数据¶ In [1]: from random import randint In [2]: data = [randint(-10,10) for _ in range(10)] In [3]: data Out[3]: [4, 4, -5, 6, 7, 阅读全文