我正在尝试对python字典进行排序,并遇到了一些问题.字典采用以下格式：{UID：名称,类型}.

dic1={"720155": ["CAT", "Software"], "356d05": ["ESF", "Software"], "3b3758": ["DBA", "Software"], "9649db": ["Fun", "Software"], "96493f": ["Eagle", "Software"], "99701d": ["Pas", "Software"], "964971": ["Debug", "Software"], "b6f315": ["Bap", "Software"], "a0a824": ["Server", "Software"], "1e00sa": ["Adobe", "Software"], "8c8dd2": ["EXIT", "Software"], "cc1dfg": ["email", "Software"]}

我使用sorted(dic1.iteritems(),key = operator.itemgetter(1)),但这允许“电子邮件”项位于最后,而不是在“调试”名称之后.见下文：

[('1e00sa', ['Adobe', 'Software']), 
('b6f315', ['Bap', 'Software']), 
('720155',['CAT', 'Software']), 
('3b3758', ['DBA', 'Software']), 
('964971', ['Debug', 'Software']), 
('356d05', ['ESF', 'Software']), 
('8c8dd2', ['EXIT', 'Software']), 
('96493f', ['Eagle', 'Software']), 
('9649db', ['Fun', 'Software']), 
('99701d', ['Pas', 'Software']), 
('a0a824', ['Server', 'Software']), 
('cc1dfg', ['email', 'Software'])]

我尝试使用sorted(sorted(dic1.iteritems(),key = operator.itemgetter(1)),key = str.lower),但这会导致一个错误,即接收到元组而不是字符串.

有任何想法吗？我无法更改字典的形成方式,它必须保持原样.

解决方法:

您需要一个更复杂的按键功能：

sorted(dic1.iteritems(), key=lambda i: i[1][0].lower())

这将对值的第一个元素进行小写排序.

演示：

>>> from pprint import pprint
>>> dic1={"720155": ["CAT", "Software"], "356d05": ["ESF", "Software"], "3b3758": ["DBA", "Software"], "9649db": ["Fun", "Software"], "96493f": ["Eagle", "Software"], "99701d": ["Pas", "Software"], "964971": ["Debug", "Software"], "b6f315": ["Bap", "Software"], "a0a824": ["Server", "Software"], "1e00sa": ["Adobe", "Software"], "8c8dd2": ["EXIT", "Software"], "cc1dfg": ["email", "Software"]}
>>> pprint(sorted(dic1.iteritems(), key=lambda i: i[1][0].lower()))
[('1e00sa', ['Adobe', 'Software']),
 ('b6f315', ['Bap', 'Software']),
 ('720155', ['CAT', 'Software']),
 ('3b3758', ['DBA', 'Software']),
 ('964971', ['Debug', 'Software']),
 ('96493f', ['Eagle', 'Software']),
 ('cc1dfg', ['email', 'Software']),
 ('356d05', ['ESF', 'Software']),
 ('8c8dd2', ['EXIT', 'Software']),
 ('9649db', ['Fun', 'Software']),
 ('99701d', ['Pas', 'Software']),
 ('a0a824', ['Server', 'Software'])]