add 100+ link

stephenh67 · stephenh67 · commit 05ce10dcfbd1 · 2019-08-10T14:09:02.000-04:00
diff --git a/README.md b/README.md
@@ -98,6 +98,8 @@ includes several external packages.
 
 * [_Practice Python_](http://www.practicepython.org/) Over 30 beginner Python exercises with solutions
 
+* [_100+ Python challenging programming exercises_](https://github.com/zhiwehu/Python-programming-exercises)
+
 
 #### Coding Challenges
 
