Python: Sum a specific column of a list in a given list of lists
Python List: Exercise - 142 with Solution
Write a Python program to sum a specific column of a list in a given list of lists.
Sample Solution:
Python Code:
def sum_column(nums, C):
result = sum(row[C] for row in nums)
return result
nums = [
[1,2,3,2],
[4,5,6,2],
[7,8,9,5],
]
print("Original list of lists:")
print(nums)
column = 0
print("\nSum: 1st column of the said list of lists:")
print(sum_column(nums, column))
column = 1
print("\nSum: 2nd column of the said list of lists:")
print(sum_column(nums, column))
column = 3
print("\nSum: 4th column of the said list of lists:")
print(sum_column(nums, column))
Sample Output:
Original list of lists: [[1, 2, 3, 2], [4, 5, 6, 2], [7, 8, 9, 5]] Sum: 1st column of the said list of lists: 12 Sum: 2nd column of the said list of lists: 15 Sum: 4th column of the said list of lists: 9
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