python - 向列表中添加值

Question

我是 R 新手，正在尝试为我的漫画书创建一个基本的“数据库”。但是，我有一个问题。

想法是将每个新条目放置为列表。我假设我可以将列表设置为如下所示。

[Thor, 50, Marvel]
[Thor, 51, Marvel]
[Thor, 52, Marvel]
...
eventually, I 'd like to include entries for story arc, writer, artist, etc.

但是，我使用以下代码输入漫画，发现每个新条目都只是添加到列表的末尾。

option = 0
comicdb = []

while option != 3:
    print "--------------------------"
    print "1. Add a New Comic Book"
    print "2. Print the Database"
    print "3. Quit"
    option = int(raw_input("Pick an Option: "))
    if option == 1:
        title = raw_input("Comic Book Title: ")
        issue = int(raw_input("Issue Number: "))
        publisher = raw_input("Publisher: ")
        comicdb.append(title)
        comicdb.append(issue)
        comicdb.append(publisher)
        print comicdb

运行代码几次后，列表如下所示:

['Thor', 50, 'Marvel', 'Thor', 51, 'Marvel', 'Thor', 52, 'Marvel']

我假设以下情况之一是错误的，但我无法弄清楚:

1. append 是错误的命令
2. 我应该使用字典或元组而不是列表

帮助!

Answer 1

答案很简单。您向列表中插入 3 个词，而不是附加包含这 3 个词的列表。

应该是这样的:

option = 0
comicdb = []

while option != 3:
    print "--------------------------"
    print "1. Add a New Comic Book"
    print "2. Print the Database"
    print "3. Quit"
    option = int(raw_input("Pick an Option: "))
    if option == 1:
        title = raw_input("Comic Book Title: ")
        issue = int(raw_input("Issue Number: "))
        publisher = raw_input("Publisher: ")
        temp_list = []
        temp_list.append(title)
        temp_list.append(issue)
        temp_list.append(publisher)
        comicdb.append(temp_list)
        print comicdb