Update Day_17.md

Author: darkprinx

Status/Day_17.md

@@ -126,6 +126,26 @@ def binary_search_Ascending(array, target):
 Array = [1,5,8,10,12,13,55,66,73,78,82,85,88,99]
 print('The Value Found at Index:',binary_search_Ascending(Array, 82))
 
+```
+---------------------
+**Solution by yuan1z: Python 3**
+```python
+idx = 0
+def bs(num,num_list):
+ global idx
+ if (len(num_list) == 1):
+ if num_list[0] == num:
+ return idx
+ else:
+ return "No exit in the list"
+ elif num in num_list[:len(num_list)//2]:
+ return bs(num,num_list[:len(num_list)//2])
+ else:
+ idx += len(num_list)//2
+ return bs(num,num_list[len(num_list)//2:])
+ 
+print(bs(66,[1,5,8,10,12,13,55,66,73,78,82,85,88,99,100]))
+
 ```
 ---------------------
 
@@ -190,4 +210,4 @@ print(rand_num)
 
 [***go to next day***](https://github.com/darkprinx/100-plus-Python-programming-exercises-extended/blob/master/Status/Day_18.md "Day 18")
 
-[***Discussion***](https://github.com/darkprinx/100-plus-Python-programming-exercises-extended/issues/3)
+[***Discussion***](https://github.com/darkprinx/100-plus-Python-programming-exercises-extended/issues/3)