867. Transpose Matrix

1. Question:

867. Transpose Matrix

https://leetcode.com/problems/transpose-matrix/

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]]

2. Solution:

class Solution:
    def transpose(self, A):
        """
        :type A: List[List[int]]
        :rtype: List[List[int]]
        """

        re_list = []

        m = len(A)
        n = len(A[0])

        for row in range(n):
            re = []
            for i in range(m):
                re.append(A[i][row])
            re_list.append(re)
        return re_list