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NumPy: Shuffle numbers between 0 and 10

NumPy: Random Exercise-6 with Solution

Write a NumPy program to shuffle numbers between 0 and 10 (inclusive).

Sample Solution:

Python Code :

import numpy as np
x = np.arange(10)
np.random.shuffle(x)
print(x)
print("Same result using permutation():")
print(np.random.permutation(10))

Sample Output:

[2 7 1 5 3 9 0 4 6 8]                                                  
Same result using permutation():                                       
[8 9 0 4 7 3 1 6 5 2]

Pictorial Presentation:

NumPy Random: Shuffle numbers between 0 and 10.

Python-Numpy Code Editor:

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Previous: Write a NumPy program to create a random 10x4 array and extract the first five rows of the array and store them into a variable.
Next: Write a NumPy program to normalize a 3x3 random matrix.

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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