Python程序按姓氏对姓名列表进行排序

给定一个姓名列表，任务是编写一个Python程序，按姓氏对姓名列表进行排序。

例子：

Input: [‘John Wick’, ‘Jason Voorhees’]

Output: [‘Jason Voorhees’, ‘John Wick’]

Explanation: V in Voorhees of Jason Voorhees is less than W in Wick of John Wick. 

Input: [‘Freddy Krueger’, ‘Keyser Söze’,’Mohinder Singh Pandher’]

Output: [‘Freddy Krueger’, ‘Mohinder Singh Pandher’, ‘Keyser Soze’]

Explanation: K< P < S

方法#1：对转换后的二维列表使用sorted()方法。

将姓名列表转换为二维姓名列表，其中第一个索引代表名字，最后一个索引代表姓氏。应用sorted()方法，将键作为 2D 列表中每个元素的最后一个索引。

Python3

# explicit function sort names
# by their surnames
def sortSur(nameList):
    l2 = []
  
    # create 2d list of names
    for ele in nameList:
        l2.append(ele.split())
    nameList = []
  
    # sort by last name
    for ele in sorted(l2, key=lambda x: x[-1]):
        nameList.append(' '.join(ele))
  
    # return sorted list
    return nameList
  
  
# Driver Code
  
# assign list of names
nameList = ['John Wick', 'Jason Voorhees',
            'Freddy Krueger', 'Keyser Soze',
            'Mohinder Singh Pandher']
  
# display original list
print('\nList of Names:\n', nameList)
print('\nAfter sorting:\n', sortSur(nameList))

输出：

List of Names:
[‘John Wick’, ‘Jason Voorhees’, ‘Freddy Krueger’, ‘Keyser Soze’, ‘Mohinder Singh Pandher’]

After sorting:
[‘Freddy Krueger’, ‘Mohinder Singh Pandher’, ‘Keyser Soze’, ‘Jason Voorhees’, ‘John Wick’]

方法 #2：使用sort()方法 + lambda

对给定的名称列表使用sort()方法，键为lambda x: x.split()[-1])表示列表中每个元素中的最后一个字符串。

蟒蛇3

# explicit function sort names
# by their surnames
def sortSur(nameList):
      
    # sort list by last name
    nameList.sort(key=lambda x: x.split()[-1])
      
    # return sorted list
    return nameList
  
  
# Driver Code
  
# assign list of names
nameList = ['John Wick', 'Jason Voorhees',
            'Freddy Krueger', 'Keyser Soze',
            'Mohinder Singh Pandher']
  
# display original list
print('\nList of Names:\n', nameList)
print('\nAfter sorting:\n', sortSur(nameList))

输出：

List of Names:
[‘John Wick’, ‘Jason Voorhees’, ‘Freddy Krueger’, ‘Keyser Soze’, ‘Mohinder Singh Pandher’]

After sorting:
[‘Freddy Krueger’, ‘Mohinder Singh Pandher’, ‘Keyser Soze’, ‘Jason Voorhees’, ‘John Wick’]