矩阵删除、插入、尾部添加操作(delete,insert,append) (1)

import numpy as np
matrix = [
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
]

p1=np.delete(matrix,1,0)

print('>>>>p1>>>>\n',p1)

>>>>p1>>>>
 [[ 1  2  3  4]
 [ 9 10 11 12]]

p2 = np.delete(matrix, 1, 1)
print('>>>>p2>>>>\n',p2)

>>>>p2>>>>
 [[ 1  3  4]
 [ 5  7  8]
 [ 9 11 12]]

p3 = np.delete(matrix, 1)
print('>>>>p3>>>>\n',p3)

>>>>p3>>>>
 [ 1  3  4  5  6  7  8  9 10 11 12]

p4 = np.delete(matrix, [0,1], 1) 
print('>>>>p4>>>>\n',p4)

>>>>p4>>>>
 [[ 3  4]
 [ 7  8]
 [11 12]]

import numpy as np
matrix = [
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
]

q1 = np.insert(matrix, 1, [1,1,1,1], 0)
print('>>>>q1>>>>\n',q1)

>>>>q1>>>>
 [[ 1  2  3  4]
 [ 1  1  1  1]
 [ 5  6  7  8]
 [ 9 10 11 12]]

q2 = np.insert(matrix, 0, [1,1,1], 1)
print('>>>>2>>>>\n',q2)

>>>>2>>>>
 [[ 1  1  2  3  4]
 [ 1  5  6  7  8]
 [ 1  9 10 11 12]]

q3 = np.insert(matrix, 3, [1,1,1,1], 0) 
print('>>>>3>>>>\n',q3)

>>>>3>>>>
 [[ 1  2  3  4]
 [ 5  6  7  8]
 [ 9 10 11 12]
 [ 1  1  1  1]]

mport numpy as np
matrix = [
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
]

  File "<ipython-input-20-d202c3e7f41f>", line 1
    mport numpy as np
          ^
SyntaxError: invalid syntax

m1 = np.append(matrix,[[1,1,1,1]],axis=0)

print('>>>>m1>>>>\n',m1)
m2 = np.append(matrix,[[1],[1],[1]],axis=1)

>>>>m1>>>>
 [[ 1  2  3  4]
 [ 5  6  7  8]
 [ 9 10 11 12]
 [ 1  1  1  1]]

print('>>>>m2>>>>\n',m2)
m3 = np.append(matrix,[[1],[1],[1]],axis=1)

>>>>m2>>>>
 [[ 1  2  3  4  1]
 [ 5  6  7  8  1]
 [ 9 10 11 12  1]]

print('>>>>m3>>>>\n',m3)

>>>>m3>>>>
 [[ 1  2  3  4  1]
 [ 5  6  7  8  1]
 [ 9 10 11 12  1]]