Performing an index operation in Python

I want to perform an index operation using the list I5 to create a new list I6. However, there seems to be an error in notation.

This is the logic

I6=[[(I5[0][0]),(I5[0][1]-I5[0][0])],[(I5[1][0]),(I5[1][1]-I5[1][0])],...]

The code is

I5 = [[(0.5, -0.5), (1.5, -0.5)], [(0.5, -0.5), (0.5, -1.5)], [(1.5, -0.5), (1.5, -1.5)], [(0.5, -1.5), (1.5, -1.5)]]

for i in range (0,len(I5)):
    I6=I5[i][0]-I5[i][1]
    print(I6)

The error is

in <module>
    I6=I5[i][0]-I5[i][1]

TypeError: unsupported operand type(s) for -: 'tuple' and 'tuple'

The expected output is

I6 = [[(0.5, -0.5), (1, 0)], [(0.5, -0.5), (0, -1)], [(1.5, -0.5), (0, -1)], [(0.5, -1.5), (1, 0)]]

>Solution :

Try:

I5 = [
    [(0.5, -0.5), (1.5, -0.5)],
    [(0.5, -0.5), (0.5, -1.5)],
    [(1.5, -0.5), (1.5, -1.5)],
    [(0.5, -1.5), (1.5, -1.5)],
]

I6 = []
for i in range(0, len(I5)):
    I6.append(
        [I5[i][0], (I5[i][1][0] - I5[i][0][0], I5[i][1][1] - I5[i][0][1])]
    )

print(I6)

Prints:

[
    [(0.5, -0.5), (1.0, 0.0)],
    [(0.5, -0.5), (0.0, -1.0)],
    [(1.5, -0.5), (0.0, -1.0)],
    [(0.5, -1.5), (1.0, 0.0)],
]