Update README.md

Author: hermite2053

README.md

@@ -1,6 +1,11 @@
 # Python-learning
 
-My learning Python3.
+My learning Python3, using Python 3.9.
+
+## abstract
+
+This repository contains Python3 code spawned during my studying Python.
+I am following [The Python Tutorial (version 3.9)](https://docs.python.org/3.9/tutorial/index.html) to learn and understand Python3 basics.
 
 ## note