Python|对给定字符串列表中的所有子列表进行排序

给定一个列表列表，任务是对给定字符串列表中的每个子列表进行排序。

例子：

Input:
lst = [['Machine', 'London', 'Canada', 'France'],
       ['Spain', 'Munich'],
       ['Australia', 'Mandi']]

Output:
flist = [['Canada', 'France', 'London', 'Machine'],
         ['Munich', 'Spain'],
         ['Australia', 'Mandi']]

有多种方法可以按字母顺序对每个列表进行排序。

方法#1：使用地图

# Python code  to sort all sublists 
# in given list of strings
  
# List initialization
Input = [['Machine', 'London', 'Canada', 'France', 'Lanka'],
         ['Spain', 'Munich'],
         ['Australia', 'Mandi']]
  
# Using map for sorting
Output = list(map(sorted, Input))
  
# Printing output
print(Output)

输出：

[[‘Canada’, ‘France’, ‘Lanka’, ‘London’, ‘Machine’], [‘Munich’, ‘Spain’], [‘Australia’, ‘Mandi’]]

方法 #2：使用 lambda 并排序

# Python code  to sort all sublists
# in given list of strings
  
# List initialization
Input = [['Machine', 'London', 'Canada', 'France', 'Lanka'],
         ['Spain', 'Munich'],
         ['Australia', 'Mandi']]
  
# using lambda and sorted
Output = [sorted(x, key = lambda x:x[0]) for x in Input]
  
# Printing output
print(Output)

输出：

[[‘Canada’, ‘France’, ‘London’, ‘Lanka’, ‘Machine’], [‘Munich’, ‘Spain’], [‘Australia’, ‘Mandi’]]

方法#3：使用迭代和排序

# Python code  to sort all sublists
# in given list of strings
  
# List initialization
Input = [['Machine', 'London', 'Canada', 'France', 'Lanka'],
         ['Spain', 'Munich'],
         ['Australia', 'Mandi']]
  
# sorting sublist
for sublist in Input:
    sublist.sort()
  
# Printing output
print(Input)

输出：

[[‘Canada’, ‘France’, ‘Lanka’, ‘London’, ‘Machine’], [‘Munich’, ‘Spain’], [‘Australia’, ‘Mandi’]]