按重要性顺序对列表中的名称进行排序

时间:2012-04-23 18:15:22

标签: python sorting

我有多个列表,按重要性顺序排列。我需要对此列表进行排序。重要的是列表中的姓氏很重要。如果列表中有两个与姓氏相似的名称,则应首先打印姓氏。此外,我需要确保字母表案例在排序后不会更改。

>>> mylist = ["Ramesh G","K V R Santhosh","Srikanth T G", "R V Laxaman","Ramesh Ghosh"]

>>> mylist.sort()

>>> for x in sorted(mylist):

...     print x

...

K V R Santhosh
R V Laxaman
Ramesh G
Ramesh Ghosh
Srikanth T G

在上面的排序中,我首先打印“Ramesh G”,我的要求是在“Ramesh G”之前打印“Ramesh Ghosh”,如下所示:

K V R Santhosh
R V Laxaman
Ramesh Ghosh
Ramesh G
Srikanth T G

谢谢


我已经编写代码来按姓氏对名称进行排序,但仍然无法找到如何在排序后列表中的任何类似名称之前打印姓氏。

#!/bin/python
# sort a list of names by last name

import operator

data = input ("Enter the list: ")

data_as_lists = [ line.split() for line in data ]

data_as_lists.sort(key=operator.itemgetter(-1))

for each_item in data_as_lists :
   print " ".join(each_item)

此代码打印输出如下:

python sort_name.py
Enter the list: ["Ramesh G","K V R Santhosh","Srikanth T G", "R V Laxaman","Ramesh Ghosh"]
Ramesh G
Srikanth T G
Ramesh Ghosh
R V Laxaman
K V R Santhosh

我想要的输出应该是这样的:

 python sort_name.py
    Enter the list: ["Ramesh G","K V R Santhosh","Srikanth T G", "R V Laxaman","Ramesh Ghosh"]
    Ramesh Ghosh
    Ramesh G
    Srikanth T G
    R V Laxaman
    K V R Santhosh

1 个答案:

答案 0 :(得分:2)

在python 2.x中,您可以将cmp参数传递给list.sort方法,您可以在其中实现任何自定义比较功能,例如。

def mycmp(a, b):
    if a.startswith(b):
        return -1
    return cmp(a, b)

mylist = ["Ramesh G","K V R Santhosh","Srikanth T G", "R V Laxaman","Ramesh Ghosh"]
mylist.sort(cmp=mycmp)
print "\n".join(mylist)

输出:

K V R Santhosh
R V Laxaman
Ramesh Ghosh
Ramesh G
Srikanth T G

在python 3.x cmp参数已被删除,但您可以使用func工具中定义的cmp_to_key