# Create a nested list of tuples
data = [
[(1, 2), (3, 4)],
[(5, 6), (7, 8)],
[(9, 10), (11, 12)]
]
row_index = 1
add_value = 10
data[row_index] = [(a + add_value, b + add_value) for (a, b) in data[row_index]]
for i in range(len(data)):
print(f"Row {i}:", data[i])
'''
run:
Row 0: [(1, 2), (3, 4)]
Row 1: [(15, 16), (17, 18)]
Row 2: [(9, 10), (11, 12)]
'''