Guillaume Redoulès

Sorting an array

  2. Python
  3. Basics

Using lists

Python provides an iterator to sort an array sorted()

you can use it this way :

import random

# Random lists from [0-999] interval
arr = [random.randint(0, 1000) for r in range(10)] 
print(f'Initial random list : {arr}\n')


reversed_arr = list(sorted(arr))
print(f'Sorted list : {reversed_arr}')

Initial random list : [277, 347, 976, 367, 604, 878, 148, 670, 229, 432]

Sorted list : [148, 229, 277, 347, 367, 432, 604, 670, 878, 976]

it is also possible to use the sort function from the list object

# Random lists from [0-999] interval
arr = [random.randint(0, 1000) for r in range(10)] 
print(f'Initial random list : {arr}\n')

arr.sort()
print(f'Sorted list : {arr}')

Initial random list : [727, 759, 68, 103, 23, 90, 258, 737, 791, 567]

Sorted list : [23, 68, 90, 103, 258, 567, 727, 737, 759, 791]

Using numpy

If you are using numpy you can sort an array by creating a view on the array:

import numpy as np
arr = np.random.random(5)
print(f'Initial random array : {arr}\n')


sorted_arr = np.sort(arr)
print(f'Sorted array : {sorted_arr}')

Initial random array : [0.40021786 0.13876208 0.19939047 0.46015169 0.43734158]

Sorted array : [0.13876208 0.19939047 0.40021786 0.43734158 0.46015169]