发布时间:2019-09-26 07:27:17编辑:auto阅读(1819)
在使用python3时,有【并行迭代】与【按索引迭代】,并行迭代相对来说好理解,现在介绍下【按索引迭代】。
废话不多,直接上实例
# Demo:并行迭代 zip函数 names = ["anne","beth","george","damon","bob"] ages = [12,45,32,102,101,103] # names 与 ages 列表元素可以不等同,按数量少的进行对应 for name,age in zip(names,ages): print(name,"is",age,"years old!") 按索引迭代案例 按索引迭代方式一 strings = ["Alice","Bob","Nick"] # strings[1] = "leo" #测试给列表添加元素后,的效果 # print(strings) index = 0 for string in strings: if "ob" in string: strings[index] = "Tom" # 将含有“ob”的元素,替换为Tom index += 1 print(strings) 按索引迭代方式二 strings = ["Alice","Bob","Nick"] index = 0 for index,string in enumerate(strings): if "ob" in string: strings[index] = "Tom" print(strings) |
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