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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:")
print(x)
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-Numpy Code Editor:

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m