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Python | Remove similar element rows in tuple Matrix
  • Last Updated : 29 Oct, 2019

Sometimes, while working with data, we can have a problem in which we need to remove elements from tuple matrix on a condition that if all elements in row of tuple matrix is same. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using list comprehension + all()
This task can be performed using combination of above functions. In this, we traverse all rows using list comprehension and remove all elements that match the initial element in row’s column with help of all().




# Python3 code to demonstrate working of
# Remove similar element rows in tuple Matrix
# using list comprehension + all()
  
# initialize tuple
test_tup = ((1, 3, 5), (2, 2, 2),
            (9, 10, 10), (4, 4, 4))
  
# printing original tuple
print("The original tuple : " + str(test_tup))
  
# Remove similar element rows in tuple Matrix
# using list comprehension + all()
res = tuple(ele for ele in test_tup if not all(sub == ele[0] for sub in ele))
  
# printing result
print("The tuple after removal of like-element rows : " + str(res))
Output :
The original tuple : ((1, 3, 5), (2, 2, 2), (9, 10, 10), (4, 4, 4))
The tuple after removal of like-element rows : ((1, 3, 5), (9, 10, 10))

 

Method #2 : Using set() + generator expression
This task can also be performed using the given functionalities. In this, we just check for length of reduced row using set() to be greater than 1. If yes, we know that it is the target row to be removed.






# Python3 code to demonstrate working of
# Remove similar element rows in tuple Matrix
# using set() + generator expression
  
# initialize tuple
test_tup = ((1, 3, 5), (2, 2, 2), 
            (9, 10, 10), (4, 4, 4))
  
# printing original tuple
print("The original tuple : " + str(test_tup))
  
# Remove similar element rows in tuple Matrix
# using set() + generator expression
res = tuple(ele for ele in test_tup if len(set(ele)) > 1)
  
# printing result
print("The tuple after removal of like-element rows : " + str(res))
Output :
The original tuple : ((1, 3, 5), (2, 2, 2), (9, 10, 10), (4, 4, 4))
The tuple after removal of like-element rows : ((1, 3, 5), (9, 10, 10))

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