Update README.md

Author: QueenieCplusplus

README.md

@@ -3,6 +3,12 @@ to have a landscape view in PKG and Module strucure
 
 practice <https://pyliaorachel.github.io/blog/tech/python/2017/09/15/pythons-import-trap.html>
 
+# to declare a folder as PKG, to declare a file as a module
+
+using 
+
+     __init__.py (empty file)
+
 # to know the Project Structure
 
     $cd <pkg>