Add Python

Author: LokiSharp

8.countingSort.md

@@ -32,4 +32,23 @@ function countingSort(arr, maxValue) {
 
     return arr;
 }
-```
+```
+## 3. JavaScript 代码实现
+
+```python
+def countingSort(arr, maxValue):
+    bucketLen = maxValue+1
+    bucket = [0]*bucketLen
+    sortedIndex =0
+    arrLen = len(arr)
+    for i in range(arrLen):
+        if not bucket[arr[i]]:
+            bucket[arr[i]]=0
+        bucket[arr[i]]+=1
+    for j in range(bucketLen):
+        while bucket[j]>0:
+            arr[sortedIndex] = j
+            sortedIndex+=1
+            bucket[j]-=1
+    return arr
+```