numpy array splicing combination

import numpy as np


# 创建数组
arr1 = np.arange(6).reshape(2,3)
arr2 = np.array([[1, 2, 3], [2, 3, 4]])

# 横向拼接
# arr3 = np.hstack((arr1, arr2))
arr5 = np.concatenate((arr1, arr2),axis=1)
# print(arr3)
# print(arr5)

# 纵向拼接
arr4 = np.vstack((arr1, arr2))
# arr6 = np.concatenate((arr1, arr2),axis=0)
print(arr4)
# print(arr6)

# 拼接过程中横向拼接，行数必须一致
arr7 = np.array([[1, 2], [3, 4]])
arr8 = np.array([[7, 8, 9], [8, 9, 10]])
arr9 = np.concatenate((arr1, arr7),axis=1)
# 纵向拼接列数必须一致
arr10 = np.concatenate((arr1, arr8),axis=0)
# print(arr9)
# print(arr10)