distinguish operators and functions

hjwp · hjwp · commit 8967a8bfc1e5 · 2014-08-05T11:07:49.000+01:00
feels a bit like nitpicking, but hopefully not too difficult an extra concept to add?
diff --git a/python_introduction/README.md b/python_introduction/README.md
@@ -89,7 +89,8 @@ OK, enough of strings. So far you've learned about:
 
 - __the prompt__ - typing commands (code) into the Python prompt results in answers in Python
 - __numbers and strings__ - in Python numbers are used for math and strings for text objects
-- __functions__ - are actions in Python. You've used both English-language functions (upper(), len()) and symbolic ones (+, *).
+- __operators__ - like + and *, combine values to produce a new one
+- __functions__ - like upper() and len(), perform actions on objects.
 
 These are the basics of every programming language you learn. Ready for something harder? We bet you are!
 
