translate the matlab code into python provide python code

function x = thomas 3 (A, D, n) Extract columns a = A(:,1); b = A(:, 2); C = A(:, 3); d =D; Initialize bar variables b_b = zeros (n,1); c_b = zeros (n,1); d_b = zeros (n,1); Initial Conditions for bar variables b_b(1) = b(1); c_b (1) = c(1); d b (1) d (1) Calculate bar variables for i = 2:n b_b(i) = b(i) - (a (i)*c_b(i-1)/b_b(i-1)); c_b(i) c(i); 22 d_b(i) d(i) - (a(i)*d_b(i-1)/b_b(i-1)); end Initial condition for X x (n) = d_b(n)/b_b(n); i = n-1; Calculatex while (i >= 1) x(i) = (d_b(i)-(c_b(i)*x(i+1)))/b_b(i); i = i-1; end end