dir(print) is not valid in Python 2

It is valid only in Python 3.

Thanks to jemshad.ok@gmail.com for alerting me about this!

modules.asciidoc

@@ -264,8 +264,8 @@ A note on `del` - this statement is used to *delete* a variable/name and after t
 run, in this case `del a`, you can no longer access the variable `a` - it is as if it never existed
 before at all.
 
-Note that the `dir()` function works on *any* object. For example, run `dir(print)` to learn
-about the attributes of the print function, or `dir(str)` for the attributes of the str class.
+Note that the `dir()` function works on *any* object. For example, run `dir(str)` for the
+attributes of the `str` (string) class.
 
 There is also a http://docs.python.org/2/library/functions.html#vars[`vars()`] function which can
 potentially give you the attributes and their values, but it will not work for all cases.