用Python表示矩阵转置的具体代码，用三种方法

1. 使用numpy库中的transpose函数

import numpy as np

matrix = np.array([[1, 2], [3, 4]])
transposed_matrix = np.transpose(matrix)
print(transposed_matrix)

2. 使用numpy库中的T属性

import numpy as np

matrix = np.array([[1, 2], [3, 4]])
transposed_matrix = matrix.T
print(transposed_matrix)

3. 使用列表推导式

matrix = [[1, 2], [3, 4]]
transposed_matrix = [[row[i] for row in matrix] for i in range(len(matrix[]))]
print(transposed_matrix)