W = [[1, 0], [0, 1]]
B = [[1], [2]]
A = [[0.1, 0.2]]
delta = [[B[i][0]*A[0][j] for j in range(2)] for i in range(2)]
adapted = [[round(W[i][j]+delta[i][j], 2) for j in range(2)] for i in range(2)]
print("Adapted:", adapted)
d_in, d_out, rank = 1000, 1000, 8
print("Full parameters:", d_in*d_out)
print("Adapter parameters:", rank*(d_in+d_out))