def main():
matrix1 = [ ]
matrix2 = [ ]
a = input("Please enter matrix 1:")
a1 = a.split()
for i in range(3):
list = [eval(a1[j]) for j in range(i * 3, i * 3+3)]
matrix1.append(list)
b = input("Please enter matrix 2:")
b1 = b.split()
for i in range(3):
list = [ eval(b1[j]) for j in range(i*3, i*3+3)]
matrix2.append(list)
g = multiplyMatrix(matrix1,matrix2)
display(g)
def multiplyMatrix(a, b):
c = [ ]
list = len(b[0])*[0]
for row in range(len(a)):
#for col in range(len(b[0])):
# c[row].append([]) '"""wrong ! why ?"""
#___________________________________________________________________________
# File "matrix_mul.py", line 23, in multiplyMatrix c[row].append([])
# IndexError: list index out of range
IndexError: list index out of range
c.append([x for x in list])
for i in range(len(c)):
for j in range(len(c[0])):
for k in range(len(b)):
c[i][j] += a[i][k] * b[k][j]
return c
def display(matrix):
for i in range(len(matrix)):
for j in range(len(matrix[0])):
print(format(matrix[i][j],".1f"),' ',end = '')
print()
main()