multiply two matrices

[nilushika]

python

def readmat(r,c):
    for i in range(r):
        list=[]
        str=raw_input()
        templist=str.split()
        raw=map(int,templist)
        list.append(raw)
    return list

def product():
    list=[]
    for i in matA:
        sublist=[]
        print i[3],matB[1][1]
        for x in range(3):
            sum=0
            for e in range(4):
                sum+=i[e]*matB[e][x]
            sublist.append(sum)
        list.append(sublist)
    return list

def display(list):
    for r in list:
        for c in r:
            print c,
        print''

print 'enter A'
matA=readmat(3,4)
print 'enter B'
matB=readmat(4,3)
display(product())

why it say that list index out of bound???there is an error in product(),can u please help me?

[bvdet]

Please don't use Python builtin types for identifiers such as str and list.

You received the error because you have a list of lists (matA) and each element is only one element long, I think. I can't be sure what you expect to enter into the raw_input widget.