len()用来获取长度、字节等数值
1 a = ["hello", "world", "dlrb"] 2 b = len(a) 3 for c in range(0, b): 4 print(c, a[c])
输出结果:
0 hello 1 world 2 dlrb
我们定义了集合a,通过len获取到集合中元素的个数赋值给变量b,在for循环中通过遍历从0到变量b区间得到所有的索引给变量c
a[c]通过索引找到对应元素,最后print输出索引和对应元素
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