Python Min Heap File added

Python/MinHeap.py

@@ -0,0 +1,21 @@
+#Min Heap
+def heapify(li, x, n):
+    largest = x
+    left = 2 * x + 1
+    right = 2 * x + 2 
+    if (left < n and  li[left] < li[largest]) or (right < n and li[right] < li[largest]):
+        #print(li[x], x)
+        if left < n and li[left] < li[largest]: #cheking if left child is exist and its value is less than largest node or not
+            li[x], li[left] = li[left], li[x]
+            heapify(li, left, n)
+        elif right < n: #We just have to check right because if left is not exist then right cannot be exist. 
+            li[x], li[right] = li[right], li[x]
+            heapify(li, right, n)
+
+
+li = [3,9,2,1,4,5]
+n = len(li)
+for x in range((n // 2) - 1, -1, -1):
+    heapify(li, x, n)
+
+print(li)