在使用python3時,有【並行迭代】與【按索引迭代】,並行迭代相對來說好理解,現在介紹下【按索引迭代】。
廢話不多,直接上實例
# Demo:並行迭代 zip函數 names = ["anne","beth","george","damon","bob"] ages = [12,45,32,102,101,103] # names 與 ages 列表元素可以不等同,按數量少的進行對應 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" #測試給列表添加元素後,的效果 # print(strings) index = 0 for string in strings: if "ob" in string: strings[index] = "Tom" # 將含有“ob”的元素,替換爲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) |