Question

您从我的作业中获得的代码是

legislators = { "Tsang Yok-sing" : "DAB", "Albert Ho" : "Democratic", "Lee Cheuk-yan" : "Labour", "James To" : "Democratic", "Chan Kam-lam" : "DAB", "Lau Wong-fat" : "Economic Synergy", "Emily Lau" : "Democratic" }

我需要创建两个列表，一个只有立法者名字，另一个列有党派名单。我不明白列表之间的冒号意味着什么，我猜它以某种方式连接两者。真的很感激一些指导。

欣赏你爸爸的爱

对不起我的错误，这是人们提到的字典。 Python新手

Answer 1

您的legislators是dict而不是list。您可以访问keys和values：

names = list(legislators.keys())
parties = list(legislators.values())

print(names)
['Tsang Yok-sing', 'Lee Cheuk-yan', 'James To', 'Chan Kam-lam', 'Lau Wong-fat', 'Emily Lau', 'Albert Ho']

print(parties)
['DAB', 'Labour', 'Democratic', 'DAB', 'Economic Synergy', 'Democratic', 'Democratic']

注意只有拥有python list时才需要legislators.keys致3.x。对于python 2.x，没有必要。

修改

正如@Frerich Raabe在评论中建议的那样，你可以使用set来获得如下的独特派对：

parties = set(legislators.values()) print(parties) {'DAB', 'Democratic', 'Economic Synergy', 'Labour'}

或者如果您想要列表作为结果：

print(list(set(legislators.values()))) ['Democratic', 'Labour', 'Economic Synergy', 'DAB']

Answer 2

你所拥有的是一本字典。

您可以将其拆分为两个列表，如下所示：

legislators = { "Tsang Yok-sing" : "DAB", "Albert Ho" : "Democratic", "Lee Cheuk-yan" : "Labour", "James To" : "Democratic", "Chan Kam-lam" : "DAB", "Lau Wong-fat" : "Economic Synergy", "Emily Lau" : "Democratic" }

names = []
parties = []

for item in legislators:
    names.append(item)
    parties.append(legislators[item])

print names, parties

将导致

['Tsang Yok-sing', 'Emily Lau', 'Lau Wong-fat', 'Chan Kam-lam', 'James To', 'Albert Ho', 'Lee Cheuk-yan']
['DAB', 'Democratic', 'Economic Synergy', 'DAB', 'Democratic', 'Democratic', 'Labour']

Answer 3

使用zip(*legislators.items())

轻松上线

In[2]: legislators = { "Tsang Yok-sing" : "DAB", "Albert Ho" : "Democratic", "Lee Cheuk-yan" : "Labour", "James To" : "Democratic", "Chan Kam-lam" : "DAB", "Lau Wong-fat" : "Economic Synergy", "Emily Lau" : "Democratic" }
In[3]: names, parties = zip(*legislators.items())
In[4]: names
Out[4]: 
('Tsang Yok-sing',
 'Emily Lau',
 'Lau Wong-fat',
 'Chan Kam-lam',
 'James To',
 'Albert Ho',
 'Lee Cheuk-yan')
In[5]: parties
Out[5]: 
('DAB',
 'Democratic',
 'Economic Synergy',
 'DAB',
 'Democratic',
 'Democratic',
 'Labour')

从字典的特定元素创建列表

3 个答案: