Question

How to remove duplicates from a list of lists in Python

Answer 1

lst_lst = [[1, 2] ,[4, 5, 6], [7, 8, 9], [1, 2], [7, 8, 9], [1, 2]]
 
tmp_list = []

for l in lst_lst:
    if l not in tmp_list:
        tmp_list.append(l)

lst_lst= tmp_list

print(lst_lst)
 

  
  
  
'''
run:
  
[[1, 2], [4, 5, 6], [7, 8, 9]]
  
'''
 
 

 

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Answer 2

import itertools

lst_lst = [[1, 2] ,[4, 5, 6], [7, 8, 9], [1, 2], [7, 8, 9], [1, 2]]
 
lst_lst.sort()

lst_lst = list(l for l, _ in itertools.groupby(lst_lst))

print(lst_lst)
 

  
  
  
'''
run:
  
[[1, 2], [4, 5, 6], [7, 8, 9]]
  
'''

 

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