 # Python | Remove duplicate tuples from a list of tuples

Examples :

`  Input:  [(1, 2), (5, 7), (3, 6), (1, 2)]  Output:  [(1, 2), (5, 7), (3, 6)]  Input:  [(`a`,` z`) , (`a`,` x`), (`z`,` x`), (`a`,` x`), (`z`,` x`)]  Output:  [(`a`,` z`), (`a`,` x`), (`z`,` x`)] `

Method # 1: Understanding list

This is a naive approach to using list comprehension. Here we use two loops for and set the data structure to eliminate all duplicates.

` `

``` # Python3 program for removing duplicates # tuples from the list of tuples   def removeDuplicates (lst):     return [t for t in ( set ( tuple (i) for i in lst))]   # Driver code lst = [( 1 , 2 ), ( 5 , 7 ), ( 3 , 6 ), ( 1 , 2 )] print (removeDuplicates ( lst)) ```

` ` Exit:

` [(1, 2), (5, 7), (3, 6)] `

Method # 2: List Comprehension (Effective Approach)

This method is effective when compared to with the above method, here we use one for loop within a list comprehension and then convert it to a set to remove duplicates and then convert it back to a list again.

 ` # Python3 duplicate remover ` ` # tuples from a list of tuples ` `  ```` def removeDuplicates (lst):      return list ( set ([i for i in lst]))   # Driver code lst = [( 1 , 2 ), ( 5 , 7 ), ( 3 , 6 ), ( 1 , 2 )] print (removeDuplicates (lst)) ```

Exit :

` [(1, 2), (5, 7), (3, 6)] `

Method # 3: method enums Python ()

` `

``` # Python3 duplicate remover # tuples from list of tuples   def removeDuplicates (lst):   return [[a, b] for i, [a, b] in enumerate (lst)  if not any (c = = b for _, c in lst [ : i])]   # Driver code lst = [( 1 , 2 ), ( 5 , 7 ), ( 3 , 6 ), ( 1 , 2 )] print (removeDuplicates (lst)) ```

` ` Exit:

` [[1, 2], [5, 7], [3, 6]] `