On 10/16/2012 09:54 PM, Kevin Anthony wrote: > I've been teaching myself list comprehension, and i've run across something > i'm not able to convert. > > here's the original code for matrix multiplcation > > retmatrix = Matrix(self.__row,other.__col) > for m in range(0,retmatrix.__row): > for n in range(0,retmatrix.__col): > product = 0 > for p in range(1,self.__col+1): > product += (self.__matrix[m][p] * other.__matrix[p][n]) > retmatrix.__matrix[m][n] = product > > Here is what i have so far: > retmatrix.__matrix = [[ product = product + (self.__matrix[m][p]* > other.__matrix[p][n]) > if product else self.__matrix[m][p]* other.__matrix[p][n]) > for p in range(0,self.col) > for n in range(0,self.col)] > for m in range(0,self.__row)] > > But i know that isn't correct, can someone nudge my in the right direction? > >
The biggest thing to learn about list comprehensions is when not to use them. I can't imagine how your latter version (even if correct) is clearer than the first. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
