edit readme

Author: MoserMichael

README.md

@@ -6,8 +6,8 @@ This course covers several topics
 - [Python decorators](https://github.com/MoserMichael/python-obj-system/blob/master/decorator.md) 
 - Also see my text on [Python import system](https://github.com/MoserMichael/pythonimportplayground)
 
-The lessons are python files, these are run to create the markdown text for the lesson.
-It uses a kind of [literate programming tool](https://en.wikipedia.org/wiki/Literate_programming) developed for this course, which formats the output of the script in markdown format.
+Each lesson is a python program, the output of that program is a lesson, rendered a markdown text.
+I am using a kind of [literate programming tool](https://en.wikipedia.org/wiki/Literate_programming) developed for this course.
 The tool is right here in this repository, in the [mdformat package](https://github.com/MoserMichael/python-obj-system/tree/master/mdformat)
 
 The main function of the [mdformat package](https://github.com/MoserMichael/python-obj-system/tree/master/mdformat) is ```eval_and_quote(string_arg)```. This function does the following steps:

decorator.py

@@ -577,11 +577,19 @@ def from_name(cls_, colour_name, alpha):
         cval = Colour.from_name(colour_name) 
         return cls_(cval.red, cval.green, cval.blue, alpha)
 
-# now you can create a named colour with the same factory method from_name
-# It calls the correct method, based on the class name of the call ColourWithAlphaChannel.from_name( "red", 1.0)
+# now you can create a named colour with the same constructor/factory method from_name
+# It calls the correct method, based on the class name of the call ColourWithAlphaChannel.from_name("red", 1.0)
 
 colour_red = ColourWithAlphaChannel.from_name( "red", 1.0)
 print("color red: ", colour_red , "red:", colour_red.red , "green:", colour_red.green, "blue:", colour_red.blue, "alpha:", colour_red.alpha)
 """)
 
+header_md("The functools library", nesting=3)
+
+print_md("""
+The [functools library](https://docs.python.org/3/library/functools.html) comes as part of the python standard library.
+This library comes with some interesting decorators.
+
+""")
+
 print("*** eof tutorial ***")