Given a matrix A, return the transpose of A.

The transpose of a matrix is the matrix flipped over it’s main diagonal, switching the row and column indices of the matrix.

 

Example 1:

Input: [[1,2,3],[4,5,6],[7,8,9]]
Output: [[1,4,7],[2,5,8],[3,6,9]]

Example 2:

Input: [[1,2,3],[4,5,6]]
Output: [[1,4],[2,5],[3,6]]

 

Note:

  1. 1 <= A.length <= 1000
  2. 1 <= A[0].length <= 1000

Python

 
class Solution(object):
    def transpose(self, A):
        """
        :type A: List[List[int]]
        :rtype: List[List[int]]
        """
        L = [[] for i in range(len(A[0]))]
        for a1 in A:
            for k,v in enumerate(a1):
                L[k].append(v)
        return L

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