Matrix Transpose in Python

Question

I am trying to create a matrix transpose function for python but I can\'t seem to make it work. Say I have

theArray = [[\'a\',\'b\',\'c\'],[\'d\',\'e\',\'f\         


        

Answer 1

To complete J.F. Sebastian's answer, if you have a list of lists with different lengths, check out this great post from ActiveState. In short:

The built-in function zip does a similar job, but truncates the result to the length of the shortest list, so some elements from the original data may be lost afterwards.

To handle list of lists with different lengths, use:

def transposed(lists):
   if not lists: return []
   return map(lambda *row: list(row), *lists)

def transposed2(lists, defval=0):
   if not lists: return []
   return map(lambda *row: [elem or defval for elem in row], *lists)