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Python – Remove Rows for similar Kth column element
When it is required to remove rows for a similar ‘K’th column element, a simple iteration, and the ‘append’ method are used.
Example
Below is a demonstration of the same −
my_list = [[45, 95, 26], [70, 35, 74], [87, 65, 23], [70, 35, 74], [67,85,12], [45,65,0]]
print("The list is : " )
print(my_list)
K = 1
print("The value of K is ")
print(K)
my_result = []
my_mem = []
for index in my_list:
if not index[K] in my_mem:
my_result.append(index)
my_mem.append(index[K])
print("The resultant list is : ")
print(my_result)Output
The list is : [[45, 95, 26], [70, 35, 74], [87, 65, 23], [70, 35, 74], [67, 85, 12], [45, 65, 0]] The value of K is 1 The resultant list is : [[45, 95, 26], [70, 35, 74], [87, 65, 23], [67, 85, 12]]
Explanation
A list of list is defined and is displayed on the console.
The value for K is initialized and is printed on the console.
Two empty lists are defined.
The original list is iterated over if a specific index is not found in the second list, the index is appended to first list, and the element at the index is appended to the second list.
The first list is displayed as the output on the console.
Updated on: 13-Sep-2021
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