NumPy: Encode all the elements of a given array in cp500 and decode it again

NumPy String: Exercise-6 with Solution

Write a NumPy program to encode all the elements of a given array in cp500 and decode it again.

Sample Solution:-

Python Code:

import numpy as np
x = np.array(['python exercises', 'PHP', 'java', 'C++'], dtype=np.str)
print("Original Array:")
encoded_char = np.char.encode(x, 'cp500')
decoded_char = np.char.decode(encoded_char,'cp500')
print("\nencoded =", encoded_char)
print("decoded =", decoded_char)

Sample Input:

(['python exercises', 'PHP', 'java', 'C++'], dtype=np.str)

Sample Output:

encoded = [b'\x97\xa8\xa3\x88\x96\[email protected]\x85\xa7\x85\x99\x83\x89\xa2\x85\xa2'
 b'\xd7\xc8\xd7' b'\x91\x81\xa5\x81' b'\xc3NN']
decoded = ['python exercises' 'PHP' 'java' 'C++']

Python Code Editor:

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Python: Tips of the Day

Getting the last element of a list:

some_list[-1] is the shortest and most Pythonic.

In fact, you can do much more with this syntax. The some_list[-n] syntax gets the nth-to-last element. So some_list[-1] gets the last element, some_list[-2] gets the second to last, etc, all the way down to some_list[-len(some_list)], which gives you the first element.

You can also set list elements in this way. For instance:

>>> some_list = [1, 2, 3]
>>> some_list[-1] = 5 # Set the last element
>>> some_list[-2] = 3 # Set the second to last element
>>> some_list
[1, 3, 5]

Note that getting a list item by index will raise an IndexError if the expected item doesn't exist. This means that some_list[-1] will raise an exception if some_list is empty, because an empty list can't have a last element.

Ref: https://bit.ly/3d8TfFP