Re: Re: Need usable fparam_ function attribute

On Fri, 25 Jun 2004 18:17:59 -0700 Mark Hahn <[email protected]> wrote:

> Lenard Lindstrom wrote:
> 
> > Now that import works for prothon modules more serious projects
> > can be started. The document tools needs a solid introspection
> > module. One critical piece of information is the parameter
> > specifications of a function. Functions with parameters have
> > a fparams_ attribute. But it is unusable from within prothon.
> >
> > Prothon 0.1 Interactive Console, Build 566, Jun  3 2004 (Ctrl-D to
> > exit)
> >>>> def foo(x, y=9, *a, **k): pass
> >>>> foo.fparams_
> > [`x, <NULL>, `y, 9, <objptr:1>, `a, <objptr:2>, `k]
> >>>>
> >
> > Attempting to use foo.fparams_[1] raises a missing object exception.
> > Attempting to retrieve foo.fparams_[4] causes a page fault.
> 
> This has been fixed in a recent release.
> 
> > I gather
> > the current fparams_ is an interim solution. What will the final
> > format be?
> 
> Try it and see.  It is pretty much as final as anything else is in Prothon.
> 
> > Will all functions have an fparam_, even those without
> > parameters?
> 
> Hmm, I don't remember.  Try it and see.
> 
This is a good start. I have a working inspect.getparspec() function now. But the
default argument values come across as featureless:

Prothon 0.1 Interactive Console, Build 660, Jun 24 2004 (Ctrl-D to exit)
O>> import inspect
O>> def foo(x, y=1, z=2, *a, **k): pass
O>> print(inspect.getparspec(foo))
[[$x, $y, $z], $a, $k, [<Object:8ef5a0>, <Object:8ef5c0>]]
O>>

Object <Object:8ef5a0> should be "1". But default values in fparams_ have no
attributes and I cannot get at the values they represent. Is this a result
of evaluation of default values for each function call? Is there any way to
make the values available for constant defaults?

Lenard Lindstrom
<[email protected]>