In [1]:

    

import numpy as np


    

In [2]:

    

a = np.arange(12).reshape(3, 4)
print(a)


    

    




[[ 0  1  2  3]
 [ 4  5  6  7]
 [ 8  9 10 11]]

In [3]:

    

a_del = np.delete(a, 1, 0)
print(a_del)


    

    




[[ 0  1  2  3]
 [ 8  9 10 11]]

In [4]:

    

print(a)


    

    




[[ 0  1  2  3]
 [ 4  5  6  7]
 [ 8  9 10 11]]

In [5]:

    

print(np.delete(a, 0, 0))


    

    




[[ 4  5  6  7]
 [ 8  9 10 11]]

In [6]:

    

print(np.delete(a, 2, 0))


    

    




[[0 1 2 3]
 [4 5 6 7]]

In [7]:

    

# print(np.delete(a, 3, 0))
# IndexError: index 3 is out of bounds for axis 0 with size 3


    

In [8]:

    

print(np.delete(a, 1, 0))


    

    




[[ 0  1  2  3]
 [ 8  9 10 11]]

In [9]:

    

print(np.delete(a, 1, 1))


    

    




[[ 0  2  3]
 [ 4  6  7]
 [ 8 10 11]]

In [10]:

    

# print(np.delete(a, 1, 2))
# AxisError: axis 2 is out of bounds for array of dimension 2


    

In [11]:

    

print(np.delete(a, 1, None))


    

    




[ 0  2  3  4  5  6  7  8  9 10 11]

In [12]:

    

print(np.delete(a, 1))


    

    




[ 0  2  3  4  5  6  7  8  9 10 11]

In [13]:

    

print(np.delete(a, [0, 3], 1))


    

    




[[ 1  2]
 [ 5  6]
 [ 9 10]]

In [14]:

    

print(np.delete(a, [0, 1, 3], 1))


    

    




[[ 2]
 [ 6]
 [10]]

In [15]:

    

print(np.delete(a, slice(2), 1))


    

    




[[ 2  3]
 [ 6  7]
 [10 11]]

In [16]:

    

print(np.delete(a, slice(1, 3), 1))


    

    




[[ 0  3]
 [ 4  7]
 [ 8 11]]

In [17]:

    

print(np.delete(a, slice(None, None, 2), 1))


    

    




[[ 1  3]
 [ 5  7]
 [ 9 11]]

In [18]:

    

print(np.delete(a, np.s_[:2], 1))


    

    




[[ 2  3]
 [ 6  7]
 [10 11]]

In [19]:

    

print(np.delete(a, np.s_[1:3], 1))


    

    




[[ 0  3]
 [ 4  7]
 [ 8 11]]

In [20]:

    

print(np.delete(a, np.s_[::2], 1))


    

    




[[ 1  3]
 [ 5  7]
 [ 9 11]]

In [21]:

    

print(np.delete(np.delete(a, 1, 0), 1, 1))


    

    




[[ 0  2  3]
 [ 8 10 11]]

In [22]:

    

a_3d = np.arange(24).reshape(2, 3, 4)
print(a_3d)


    

    




[[[ 0  1  2  3]
  [ 4  5  6  7]
  [ 8  9 10 11]]

 [[12 13 14 15]
  [16 17 18 19]
  [20 21 22 23]]]

In [23]:

    

print(a_3d.shape)


    

    




(2, 3, 4)

In [24]:

    

print(np.delete(a_3d, 1, 0))


    

    




[[[ 0  1  2  3]
  [ 4  5  6  7]
  [ 8  9 10 11]]]

In [25]:

    

print(np.delete(a_3d, 1, 1))


    

    




[[[ 0  1  2  3]
  [ 8  9 10 11]]

 [[12 13 14 15]
  [20 21 22 23]]]

In [26]:

    

print(np.delete(a_3d, 1, 2))


    

    




[[[ 0  2  3]
  [ 4  6  7]
  [ 8 10 11]]

 [[12 14 15]
  [16 18 19]
  [20 22 23]]]

In [27]:

    

print(np.delete(a_3d, [0, 3], 2))


    

    




[[[ 1  2]
  [ 5  6]
  [ 9 10]]

 [[13 14]
  [17 18]
  [21 22]]]

In [28]:

    

print(np.delete(a_3d, np.s_[::2], 2))


    

    




[[[ 1  3]
  [ 5  7]
  [ 9 11]]

 [[13 15]
  [17 19]
  [21 23]]]