Python/sorts/bucket_sort.py
Mehdi ALAOUI 02c0daf9e5 Adding unit tests for sorting functions, and improving readability on some sorting algorithms (#784)
* Adding variable to fade out ambiguity

* More readability on merge sorting algorithm

* Updating merge_sort_fastest description and explaining why

* Adding tests file with imports

* Standardazing filenames and function names

* Adding test cases and test functions

* Adding test loop

* Putting 'user oriented code' inside main condition for having valid imports

* Fixing condition

* Updating tests: adding cases and todo list

* Refactoring first euler problem's first solution
2019-05-25 21:41:24 +08:00

35 lines
1.6 KiB
Python

#!/usr/bin/env python
# Author: OMKAR PATHAK
# This program will illustrate how to implement bucket sort algorithm
# Wikipedia says: Bucket sort, or bin sort, is a sorting algorithm that works by distributing the
# elements of an array into a number of buckets. Each bucket is then sorted individually, either using
# a different sorting algorithm, or by recursively applying the bucket sorting algorithm. It is a
# distribution sort, and is a cousin of radix sort in the most to least significant digit flavour.
# Bucket sort is a generalization of pigeonhole sort. Bucket sort can be implemented with comparisons
# and therefore can also be considered a comparison sort algorithm. The computational complexity estimates
# involve the number of buckets.
# Time Complexity of Solution:
# Best Case O(n); Average Case O(n); Worst Case O(n)
DEFAULT_BUCKET_SIZE=5
def bucket_sort(my_list, bucket_size=DEFAULT_BUCKET_SIZE):
if len(my_list) == 0:
raise Exception("Please add some elements in the array.")
min_value, max_value = (min(my_list), max(my_list))
bucket_count = ((max_value - min_value) // bucket_size + 1)
buckets = [[] for _ in range(int(bucket_count))]
for i in range(len(my_list)):
buckets[int((my_list[i] - min_value) // bucket_size)].append(my_list[i])
return sorted([buckets[i][j] for i in range(len(buckets))
for j in range(len(buckets[i]))])
if __name__ == "__main__":
user_input = input('Enter numbers separated by a comma:').strip()
unsorted = [float(n) for n in user_input.split(',') if len(user_input) > 0]
print(bucket_sort(unsorted))