mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-10-06 21:59:30 +00:00
51 lines
1.3 KiB
Python
51 lines
1.3 KiB
Python
"""
|
|
This is a pure python implementation of the quick sort algorithm
|
|
|
|
For doctests run following command:
|
|
python -m doctest -v quick_sort.py
|
|
or
|
|
python3 -m doctest -v quick_sort.py
|
|
|
|
For manual testing run:
|
|
python quick_sort.py
|
|
"""
|
|
from __future__ import print_function
|
|
|
|
|
|
def quick_sort(ARRAY):
|
|
"""Pure implementation of quick sort algorithm in Python
|
|
|
|
:param collection: some mutable ordered collection with heterogeneous
|
|
comparable items inside
|
|
:return: the same collection ordered by ascending
|
|
|
|
Examples:
|
|
>>> quick_sort([0, 5, 3, 2, 2])
|
|
[0, 2, 2, 3, 5]
|
|
|
|
>>> quick_sort([])
|
|
[]
|
|
|
|
>>> quick_sort([-2, -5, -45])
|
|
[-45, -5, -2]
|
|
"""
|
|
ARRAY_LENGTH = len(ARRAY)
|
|
if( ARRAY_LENGTH <= 1):
|
|
return ARRAY
|
|
else:
|
|
PIVOT = ARRAY[0]
|
|
GREATER = [ element for element in ARRAY[1:] if element > PIVOT ]
|
|
LESSER = [ element for element in ARRAY[1:] if element <= PIVOT ]
|
|
return quick_sort(LESSER) + [PIVOT] + quick_sort(GREATER)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
raw_input # Python 2
|
|
except NameError:
|
|
raw_input = input # Python 3
|
|
|
|
user_input = raw_input('Enter numbers separated by a comma:\n').strip()
|
|
unsorted = [ int(item) for item in user_input.split(',') ]
|
|
print( quick_sort(unsorted) )
|