Add binary search solution

coding/python/binary_search.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+import random
+
+rand_num_li = sorted([random.randint(1, 50) for iter in range(10)])
+target = random.randint(1, 50)
+
+def binary_search(li, le, ri, target):
+    if le <= ri:
+        mid = ri + le // 2
+        if li[mid] == target:
+            return mid
+        elif li[mid] < target:
+            return binary_search(li, mid + 1, ri, target)
+        else:
+            return binary_search(li, le, mid - 1, target)
+    else:
+        return -1
+
+
+print("List: {}\nTarget: {}\nIndex: {}".format(
+    rand_num_li, target,
+    binary_search(rand_num_li, 0, len(rand_num_li) - 1, target)))