diff --git a/README.md b/README.md
index 4a8a03b..16f9e3b 100644
--- a/README.md
+++ b/README.md
@@ -29,8 +29,9 @@ git pull upstream master
 
 ## 使用帮助
 
+* [使用码云提交作业的说明](help/gitee_homework_usage.md)
+* [学习资料的汇总](https://gitee.com/pi-lab/machinelearning_notebook/blob/master/References.md)
 * Git
-  * [使用码云提交作业的说明](help/gitee_homework_usage.md)
   * [Git使用教程](help/Git使用教程_PILAB.pdf)
   * [Git快速入门 - Git初体验](https://my.oschina.net/dxqr/blog/134811)
   * [在win7系统下使用TortoiseGit(乌龟git)简单操作Git](https://my.oschina.net/longxuu/blog/141699)
diff --git a/homework_01_python/ex1.py b/homework_01_python/ex1.py
new file mode 100644
index 0000000..d855502
--- /dev/null
+++ b/homework_01_python/ex1.py
@@ -0,0 +1,10 @@
+# exercise 1
+
+ja'sdf
+'sa
+fd
+sad
+fsa
+f
+sa
+f
\ No newline at end of file