python-转置-遍历和numpy方式

#转置的python遍历方法：
a=[
    [3,5,7,9],
    [12,14,16,18],
    [24,25,26,27]
]
hang=len(a)
lie=len(a[0])

all=[[] for i in range(lie)]

for ele in a:
    for i in range(lie):
        all[i].append(ele[i])
print(all)

[[3, 12, 24], [5, 14, 25], [7, 16, 26], [9, 18, 27]]

---

第2种：

#numpy转置
import numpy as np
a=[
    [3,5,7,9],
    [12,14,16,18],
    [24,25,26,27]
]
np.array(a).T

array([[ 3, 12, 24],
       [ 5, 14, 25],
       [ 7, 16, 26],
       [ 9, 18, 27]])