[英]How to sort a list of lists according to list item which is a number represented as string in python?
我有3个清单:
>>> a = ["12", "a"]
>>> b = ["123", "b"]
>>> c = ["4", "c"]
我把它们放在一个新列表中:
>>> d = [a,b,c]
当我根据每个内部列表的第一项对它们进行排序时:
>>> sorted(d, key=itemgetter(0))
[['12', 'a'], ['123', 'b'], ['4', 'c']]
但我想要:
[['4', 'c'], ['12', 'a'], ['123', 'b']]
此外,第一项可能具有前导零:
>>> a = ["012", "a"]
>>> b = ["0123", "b"]
>>> c = ["04", "c"]
同样,我想以这种方式查看排序后的列表:
[['04', 'c'], ['012', 'a'], ['0123', 'b']]
我怎样才能做到这一点?
只需在密钥getter中使用int()
:
In [5]: sorted(d, key=lambda x:int(x[0]))
Out[5]: [['4', 'c'], ['12', 'a'], ['123', 'b']]
在第二个示例中:
In [10]: sorted(d, key=lambda x:int(x[0]))
Out[10]: [['04', 'c'], ['012', 'a'], ['0123', 'b']]
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.