What is the error here in the simplex algorithm in python?

Question

import numpy as np
import math

A=np.array([[-2,1,1,0,0], [-1,2,0,1,0], [1,0,0,0,1]])  
b=np.array([2,7,3])
c=np.array([-1, -2, 0, 0, 0])
m,n = A.shape

N = A[0:m ,