Merge pull request TheAlgorithms#420 from prateekyo/master

Update bubble_sort.py

sorts/bubble_sort.py

@@ -1,52 +1,23 @@
-"""
-This is pure python implementation of bubble sort algorithm
-
-For doctests run following command:
-python -m doctest -v bubble_sort.py
-or
-python3 -m doctest -v bubble_sort.py
-
-For manual testing run:
-python bubble_sort.py
-"""
-
 from __future__ import print_function
 
-
-def bubble_sort(collection):
-    """Pure implementation of bubble sort algorithm in Python
-
-    :param collection: some mutable ordered collection with heterogeneous
-    comparable items inside
-    :return: the same collection ordered by ascending
-
-    Examples:
-    >>> bubble_sort([0, 5, 3, 2, 2])
-    [0, 2, 2, 3, 5]
-
-    >>> bubble_sort([])
-    []
-
-    >>> bubble_sort([-2, -5, -45])
-    [-45, -5, -2]
-    """
-    length = len(collection)
-    for i in range(length):
-        swapped = False
-        for j in range(length-1):
-            if collection[j] > collection[j+1]:
-                swapped = True
-                collection[j], collection[j+1] = collection[j+1], collection[j]
-        if not swapped: break  # Stop iteration if the collection is sorted.
-    return collection
-
-
+def bubble_sort(arr):
+  n = len(arr)
+  # Traverse through all array elements
+  for i in range(n):
+    # Last i elements are already in place
+      for j in range(0, n-i-1):
+        # traverse the array from 0 to n-i-1
+        # Swap if the element found is greater
+        # than the next element
+        if arr[j] > arr[j+1] :
+              arr[j], arr[j+1] = arr[j+1], arr[j]
+  return arr
+
 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()
+    user_input = raw_input('Enter numbers separated by a comma:').strip()
     unsorted = [int(item) for item in user_input.split(',')]
-    print(bubble_sort(unsorted))
+    print(*bubble_sort(unsorted), sep=',')