function attributes are like function objects
katz at Glue.umd.edu
Thu Feb 1 04:46:41 CET 2001
Oh, good, perhaps a calll for a Py3k suggestion?
Perhaps replace def/class with a general 'def' which would
allow the definition of
- a standard class
- a function
- an instance method
- a class method
- a singleton class
all through a single, consistent syntax.
lists, strings, dicts, ints and other types would be subclass-able.
This would solve the following current problems:
- Python lacks class methods
- Current Python has no support for subclassing from primitive
I really would like that -- provided it is consistent and not
occam's-razor syntax extension.
I had an idea where one could write
def f(x): pass
def f(self): pass
def g(): pass # where some new syntax indicates that g is static
print 'hi' # C is like a function and a class in one.
and you could call f(3), C.g(), C() to call C as a function..
that'd fill those requirements... sort of.
On the other hand, maybe there needs to be a distinct separation between
class and function; I think right now that function attributes are a
waste when the functions can use (1) global values,
(2) 'call-by-reference' (er, mutable, right?) object parameters in which
to hold values, or (3) be implemented as function objects, with all being
state = 123
state = 0
def __init__(self, state): self.state = state
state = stateHolder( 123 )
def f( s ) # s is a stateHolder
state = 123
there. I prefer (3), (I'm CS-oriented :))
On Thu, 1 Feb 2001, Magnus Lie Hetland wrote:
> "Greg Ewing" <greg at cosc.canterbury.ac.nz> wrote in message
> news:3A78AE8D.C9D25694 at cosc.canterbury.ac.nz...
> > Sean Reifschneider wrote:
> > >
> > > It didn't really
> > > seem like they were missing so much as it seemed like they would act
> > > more like everything else now...
> > Everything? What about lists, dicts, tuples, file
> > objects...?
> > What's so special about functions that we need to
> > be able to plonk arbitrary attributes on them, but
> > not any other builtin types?
> Now *that* would be nice (if we could do that, I mean).
> Everything as objects... SmallTalk lurking in the
> background. Sounds good to me...
> Magnus Lie Hetland (magnus at hetland dot org)
> "Reality is what refuses to disappear when you stop
> believing in it" -- Philip K. Dick
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