Lab6 - Subtract two matrices

def setup():
    row1=[1,2,3]
    row2=[4,5,6]
    row3=[7,8,9]
    matrix1=[row1,row2,row3]
    row4=[9,8,7]
    row5=[6,5,4]
    row6=[3,2,1]
    matrix2=[row4,row5,row6]
    subtract_tow_matrix(matrix1,matrix2)
   
def subtract_tow_matrix(matrix1,matrix2):
    iRow=0
    while(iRow < len(matrix1)):
        i=0
        print("|",end = "")
        while(i < len(matrix1[iRow])):
            print(" ",matrix1[iRow][i]-matrix2[iRow][i]," ",end  = "")
            i+=1
        print("|")
        iRow+=1
       
setup()