added radix_lsd_sort + testing

Author: Pl4tt

.gitignore

@@ -0,0 +1 @@
+*/__pycache__

sorting_algorithms/radix_lsd_sort.py

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+def radix_lsd_sort(arr):
+    if len(arr) <= 1:
+        return arr
+    
+    BASE = 10
+    max_val = max(arr)
+    factor = 1
+
+    while factor <= max_val:
+        partition = [[] for _ in range(BASE)]
+        for i in arr:
+            index = (i//factor) % BASE
+            partition[index].append(i)
+            
+        arr = []
+        for i in partition:
+            arr.extend(i)
+    
+        factor *= BASE
+
+    return arr
+
+
+def binary_radix_lsd_sort(arr):
+    if len(arr) <= 1:
+        return arr
+    
+    BASE = 2
+    bit_length = max(arr).bit_length()
+
+    for bit in range(bit_length):
+        partition = [[] for _ in range(BASE)]
+        for i in arr:
+            index = (i >> bit) & 1
+            partition[index].append(i)
+            
+        arr = [*partition[0], *partition[1]]
+
+    return arr
+
+    

sorting_algorithms/testing.py

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+from bubble_sort import bubble_sort
+from merge_sort import merge_sort
+from quicksort import quicksort
+from radix_lsd_sort import radix_lsd_sort, binary_radix_lsd_sort
+
+
+if __name__ == "__main__":
+    easy_sort_test = [9, 6, 8, 2, 3]
+    medium_sort_test = [9, 3, 8, 2, 0, -10, 3]
+    difficult_sort_test = [21561, 9, -124714, 24171, 21742174, 47421, -7285, 261, 2, 62161, 7, 521, 10, 3, 216, 7, 6216, 2, 68, 9, 0, -1247, -83148, -1235, 166, 389, 1235, 852, 13, 63, 7317, 8539, 32732, 24151621, 2157105, 121, 21, 1, -10, -100, -124, -2, 7327, 23, 19361, 32, 742, 8765, 987654321, 123456, 7654, 87, 6543, 21261, 48245, 16, 247, 942, 532, 913, 126, 274, 135, 100000, 2162, 37272, 125, 8421]
+    difficult_sort_test2 = [21561, 9, -124714, 0, -1247, 24171, 21742174, 47421, -7285, 261, 2, 521, 10, 3, 216, 7, 6216, 2, 62161, 7, 68, 9, -83148, -1235, 1, -10, 166, 389, 13, 63, 19361, 32, 7317, 8539, 32732, 24151621, -2, 7327, 2157105, 1235, 852, 121, 21, -100, -124, 23, 742, 7654, 87, 123456, 6543, 21261, 48245, 16, 8765, 987654321, 247, 125, 8421, 942, 532, 913, 126, 274, 135, 100000, 2162, 37272]
+    
+    difficult_non_negative_sort_test = [5312, 621, 7, 47, 1, 34, 7, 3146134, 416, 21, 641, 3512, 6325, 64174, 326, 3416, 417, 3164, 3421653, 731, 1431, 43181346, 631280]
+
+    print(bubble_sort(difficult_sort_test) == merge_sort(difficult_sort_test) == quicksort(difficult_sort_test2) == sorted(difficult_sort_test2))
+    
+    print(bubble_sort(difficult_sort_test) == sorted(difficult_sort_test2))
+    print(merge_sort(difficult_sort_test) == sorted(difficult_sort_test2))
+    print(quicksort(difficult_sort_test) == sorted(difficult_sort_test2))
+
+    print(radix_lsd_sort(difficult_non_negative_sort_test) == sorted(difficult_non_negative_sort_test))
+    print(binary_radix_lsd_sort(difficult_non_negative_sort_test) == sorted(difficult_non_negative_sort_test))