In [1]:

    

import numpy as np


    

In [2]:

    

a_1d = np.arange(10)
print(a_1d)


    

    




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

In [3]:

    

print(a_1d[3])


    

    




3

In [4]:

    

a_2d = np.arange(12).reshape(3, 4)
print(a_2d)


    

    




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

In [5]:

    

print(a_2d[0, 2])


    

    




2

In [6]:

    

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 [7]:

    

print(a_3d[0, 1, 2])


    

    




6

In [8]:

    

print(a_3d[1, [True, False, True], ::2])


    

    




[[12 14]
 [20 22]]