[Python-checkins] python/dist/src/Doc/ref ref7.tex,1.36,1.37

Wed Sep 24 00:11:49 EDT 2003

Update of /cvsroot/python/python/dist/src/Doc/ref
In directory sc8-pr-cvs1:/tmp/cvs-serv19643
Modified Files:
	ref7.tex 
Log Message:
- update to reflect that base classes can be class types as well as
 "classic" class objects
 [partially fixes SF bug #453684]
- add note that new-style classes can use descriptors to implement
 instance variables in different ways
Index: ref7.tex
===================================================================
RCS file: /cvsroot/python/python/dist/src/Doc/ref/ref7.tex,v
retrieving revision 1.36
retrieving revision 1.37
diff -C2 -d -r1.36 -r1.37
*** ref7.tex	12 Aug 2003 00:01:17 -0000	1.36
--- ref7.tex	24 Sep 2003 04:11:47 -0000	1.37
***************
*** 420,424 ****
 A class definition is an executable statement. It first evaluates the
 inheritance list, if present. Each item in the inheritance list
! should evaluate to a class object. The class's suite is then executed
 in a new execution frame (see section~\ref{naming}), using a newly
 created local namespace and the original global namespace.
--- 420,425 ----
 A class definition is an executable statement. It first evaluates the
 inheritance list, if present. Each item in the inheritance list
! should evaluate to a class object or class type which allows
! subclassing. The class's suite is then executed
 in a new execution frame (see section~\ref{naming}), using a newly
 created local namespace and the original global namespace.
***************
*** 434,438 ****
 \indexii{execution}{frame}
 
! \strong{Programmer's note:} variables defined in the class definition
 are class variables; they are shared by all instances. To define
 instance variables, they must be given a value in the
--- 435,439 ----
 \indexii{execution}{frame}
 
! \strong{Programmer's note:} Variables defined in the class definition
 are class variables; they are shared by all instances. To define
 instance variables, they must be given a value in the
***************
*** 442,443 ****
--- 443,446 ----
 with the same name when accessed in this way. Class variables with
 immutable values can be used as defaults for instance variables.
+ For new-style classes, descriptors can be used to create instance
+ variables with different implementation details.