[Python-Dev] decorators (not transformations) on functions vsclasses (original) (raw)
Jewett, Jim J jim.jewett at eds.com
Fri Mar 26 13:52:10 EST 2004
- Previous message: [Python-Dev] method decorators (PEP 318)
- Next message: [Python-Dev] RE: [Python-checkins] python/dist/src/Lib/test test_tcl.py, 1.3, 1.4
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Regarding decorator attributes vs tranformations, I wrote:
def bar(): pass bar.x = 27
is not so useful.
There is no intermediate "self" scope between function locals and global, so bar itself can't see x.
Robert Brewer:
True, but you can also write:
>>> def bar():
... bar.x = 4
...
>>> bar()
>>> bar.x
4...so bar itself can "see x",
The x it sees is tied to the name rather than the object.
def f(): ... print f.x f.x = 5 g=f f() 5 del f g()
Traceback (most recent call last): File "<pyshell#174>", line 1, in -toplevel- g() File "<pyshell#169>", line 2, in f print f.x NameError: global name 'f' is not defined
The self namesapce means that you can tie an attribute directly to a class object (rather than to its name).
class C: def printx(self): print self.x D=C C.x = 6 del C d=D() d.printx() 6
- Previous message: [Python-Dev] method decorators (PEP 318)
- Next message: [Python-Dev] RE: [Python-checkins] python/dist/src/Lib/test test_tcl.py, 1.3, 1.4
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]