[Python-ideas] The way decorators are parsng

[Tarek Ziadé]

Hello

Today I've tried to write a one-liner for a decorator, The decorator
is a method in a class.

I wanted to do something like this:

@Class().decorator()
def function():
    ...

That threw a syntax error to my surprise.

But the semantic is correct, since I am currently writing:

obj = Class()

@obj.decorator()
def function():
    ...

And I can also write

dec = Class().decorator

@dec()
def function():
    ...


Is there something obvious I am missing, or is there a weird thing in
the way decoratirs are parsed ?


Demo:

>>> class Some(object):
...     def stuff(self, func):
...         return func
...
>>> s = Some()
>>> @s.stuff
... def ok():
...     print 'ok'
...
>>> ok()
ok
>>> s = Some().stuff
>>> @s
... def ok():
...     print 'ok'
...
>>> ok()
ok
>>> @Some().stuff
  File "<stdin>", line 1
    @Some().stuff
           ^
SyntaxError: invalid syntax


Cheers
Tarek

-- 
Tarek Ziadé | http://ziade.org