When it is required to remove rows with duplicate element in a matrix, a list comprehension and the ‘set’ operator is used.
Example
Below is a demonstration of the same −
my_list = [[34, 23, 34], [17, 46, 47], [22, 14, 22], [28, 91, 19]]
print("The list is :")
print(my_list)
my_result = [element for element in my_list if len(set(element)) == len(element)]
print("The result is :")
print(my_result)Output
The list is : [[34, 23, 34], [17, 46, 47], [22, 14, 22], [28, 91, 19]] The result is : [[17, 46, 47], [28, 91, 19]]
Explanation
A list of list is defined and is displayed on the console.
A list comprehension is used to iterate over the elements in the list, and the length of the unique element is compared to the length of every element in the list.
If they are equal, it is stored in the list and assigned to a variable.
This is displayed as the output on the console.