Code Enhancements in merge_sort.py (#10911)

* Code Enhancements in merge_sort.py 

This enhanced code includes improved variable naming, error handling for user input, and more detailed docstrings. It's now more robust and readable.

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for more information, see https://pre-commit.ci

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Bisma nadeem 2023-10-26 02:26:54 +05:00 committed by GitHub
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commit e1e5963812
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@ -12,9 +12,13 @@ python merge_sort.py
def merge_sort(collection: list) -> list:
"""
:param collection: some mutable ordered collection with heterogeneous
comparable items inside
:return: the same collection ordered by ascending
Sorts a list using the merge sort algorithm.
:param collection: A mutable ordered collection with comparable items.
:return: The same collection ordered in ascending order.
Time Complexity: O(n log n)
Examples:
>>> merge_sort([0, 5, 3, 2, 2])
[0, 2, 2, 3, 5]
@ -26,31 +30,34 @@ def merge_sort(collection: list) -> list:
def merge(left: list, right: list) -> list:
"""
Merge left and right.
Merge two sorted lists into a single sorted list.
:param left: left collection
:param right: right collection
:return: merge result
:param left: Left collection
:param right: Right collection
:return: Merged result
"""
def _merge():
while left and right:
yield (left if left[0] <= right[0] else right).pop(0)
yield from left
yield from right
return list(_merge())
result = []
while left and right:
result.append(left.pop(0) if left[0] <= right[0] else right.pop(0))
result.extend(left)
result.extend(right)
return result
if len(collection) <= 1:
return collection
mid = len(collection) // 2
return merge(merge_sort(collection[:mid]), merge_sort(collection[mid:]))
mid_index = len(collection) // 2
return merge(merge_sort(collection[:mid_index]), merge_sort(collection[mid_index:]))
if __name__ == "__main__":
import doctest
doctest.testmod()
user_input = input("Enter numbers separated by a comma:\n").strip()
unsorted = [int(item) for item in user_input.split(",")]
print(*merge_sort(unsorted), sep=",")
try:
user_input = input("Enter numbers separated by a comma:\n").strip()
unsorted = [int(item) for item in user_input.split(",")]
sorted_list = merge_sort(unsorted)
print(*sorted_list, sep=",")
except ValueError:
print("Invalid input. Please enter valid integers separated by commas.")