Check if two matrix are equal and of not add the matrix to the list

[quest]

I have a list which contains may matrices. I called this list as su4_np and it contains more than 500 matrices
When I want to add a matrix to the list, I want to check if there is any matrix in the list which is identical to the matrix that I want to add. If there is no matrix identical to the matrix which I want to add, then add the matrix to the list:

I simply wrote the following scripts:

deneme = np.array([[-0.30902099609375 - 0.5j, 0, -0.8089599609375j, 0],
       [0, -0.30902099609375 - 0.5j, 0, -0.8089599609375j],
       [-0.8089599609375j, 0, -0.30902099609375 + 0.5j, 0],
       [0, -0.8089599609375j, 0, -0.30902099609375 + 0.5j]],dtype=object)

if any(np.array_equal(deneme, in_su4) for in_su4 in su4_np):
    print(mat)
    print(deneme)  

where su4_np is my list. However, the scripts prints the two matrix as if they are equal. But they are not equal:

The output:

[[-0.500000000000000 0 -0.30902099609375 - 0.8089599609375*I 0]
[0 -0.500000000000000 0 -0.30902099609375 - 0.8089599609375*I]
[0.30902099609375 - 0.8089599609375*I 0 -0.500000000000000 0]
[0 0.30902099609375 - 0.8089599609375*I 0 -0.500000000000000]]


[[(-0.30902099609375-0.5j) 0 (-0-0.8089599609375j) 0]
[0 (-0.30902099609375-0.5j) 0 (-0-0.8089599609375j)]
[(-0-0.8089599609375j) 0 (-0.30902099609375+0.5j) 0]
[0 (-0-0.8089599609375j) 0 (-0.30902099609375+0.5j)]]

The matrices are not equal!! How to solve this issue?
Thanks in advance

[deanhystad]

When you find a match you don't print the matching matrix, you print mat. Try this:

for in_su4 in su4_np:
    if np.array_equal(deneme, in_su4):
        print(in_su4)
        print(deneme)
        break
else:
    su4_np.append(deneme)

[ICanIBB]

for in_su4 in su4_np:
    if np.array_equal(deneme, in_su4):
        print(in_su4)
        print(deneme)
        break
    else:
        su4_np.append(deneme)

[deanhystad]

This does not work.

for in_su4 in su4_np:
    if np.array_equal(deneme, in_su4):
        print(in_su4)
        print(deneme)
        break
    else:
        su4_np.append(deneme)

The code appends deneme to su4_np each in_su4 does not match deneme. This likely means deneme will be appended multiple times. You can see that here:

x = [1, 5, 9]
y = 9

for value in x:
    if value != y:
        x.append(y)

print(x)

Output:
[1, 5, 9, 9, 9]

Even though 9 is in x, 9 != 1 and 9 != 5. Each time y is not equal to a value in x, y is appended to x.

Back to the original question, deneme should only be appended to su4_np if deneme was checked against every matrix in su4_np, and not of the matrices matched deneme.