问题删除for循环中的列表项（python）

Question

嗨，我有一个问题，在遍历python中的列表时我似乎无法删除项目，这就是我得到的：如果用户在for循环中被问到要删除的问题时输入n或N，则应该删除标题，问题在于，当所有操作完成后，所有项目仍然存在，并且没有任何项目被移除…

    titles_list = ["English", "Math", "History", "IT", "Biology", "Spanish"]

    for title in titles_list:
        print "Do you want to keep the title:", title , "\n or Delete it ? Input Y for keep, N for Delete "
        Question = raw_input()
        if str(Question.upper) == "N":
            titles_list.remove(title)

print titles_list

Answer 1

以下代码将解决您的问题。您必须遍历列表的副本。您无法从要迭代的列表中删除项目。

import copy

def main():
    titles_list = ["English", "Math", "History", "IT", "Biology", "Spanish"]
    titles_list_orig = copy.deepcopy(titles_list)

    for title in titles_list_orig:
        print "Do you want to keep the title:", title , "\n or Delete it? Input Y for keep, N for Delete "
        Question = raw_input()
        if str(Question.upper()) == "N":
            titles_list.remove(title)

    print titles_list