867. Transpose Matrix

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

Python

class Solution:
    def transpose(self, matrix: List[List[int]]) -> List[List[int]]:
        m, n = len(matrix), len(matrix[0])

        result = [[None]*m for row in range(n)]
        for row in range(m):
            for col in range(n):
                result[col][row] = matrix[row][col]

        return result