Leetcode-Easy 867.Transpose Matrix

class Solution:
    def transpose(self, A):
        """
        :type A: List[List[int]]
        :rtype: List[List[int]]
        """
        n_row=len(A)
        n_column=len(A[0])
        new_A=[]
        new_row=[]
        for i in range(n_column):
            for row in A:
                new_row.append(row[i])
            new_A.append(new_row)
            new_row=[]
        return new_A