Re: [boost] RE: [C++-SIG] py_cpp update

From: David Abrahams (abrahams_at_[hidden])
Date: 2000-10-16 16:08:32

----- Original Message -----
From: "Barry Scott" <barry_at_[hidden]>

> David,
>
> I finally got some time to play with py_cpp.
>
> There are three problems I found while playing around with demo.dll.
>
> 1. __dict__ is not working for classes derived from py_cpp classes
> 2. __doc__ for functions defined in the derived class do not work

Thanks, Barry. These are on my TODO list already. Also __class__ and
__module__.

> 3. dir(class) does not list the functions available in the class
>    (See the code of dir in the Python sources for the names of the
>     secret names it access via getattr. CXX has support for some
>     of them.)

Isn't __dict__ support enough to accomplish that?

> Here is a test that I think should run without error.

Thanks, but Python is sensitive to indentation ;-)
If you can fix it up I'll add it to my test suite.
-Dave

>
> -----------------test_py_cpp.py----------------------
> import sys
> import demo
>
> class DerivedFromFoo(demo.Foo):
> def __init__(self):
> demo.Foo.__init__( self, 1 )
>
> def fred(self):
> 'Docs for DerivedFromFoo.fred'
> print 'Barry.fred'
>
> class Base:
> i_am_base = 'yes'
> def fred(self):
> 'Docs for Base.fred'
> pass
>
>
> class DerivedFromBase(Base):
> i_am_derived_from_base = 'yes'
>
> def fred(self):
> 'Docs for DerivedFromBase.fred'
> pass
>
> print 'Testing DerivedFromFoo'
> print '----------------------'
>
> df = DerivedFromFoo()
> print 'dir(df):',dir(df)
> print 'dir(DerivedFromFoo):',dir(DerivedFromFoo)
> try:
> print 'df.__dict__:',df.__dict__
> except:
> type, value, traceback_obj = sys.exc_info()
> print '\nError: Type',type,'value',value
>
> try:
> print 'df.fred.__doc__:',df.fred.__doc__
> except:
> type, value, traceback_obj = sys.exc_info()
> print '\nError: Type',type,'value',value
>
> print
> print 'Testing DerivedFromBase'
> print '-----------------------'
>
> db = DerivedFromBase()
> print 'dir(db):',dir(db)
> print 'dir(DerivedFromBase):',dir(DerivedFromBase)
> print 'db.__dict__:',db.__dict__
> print 'db.fred.__doc__:',db.fred.__doc__
> -----------------test_py_cpp.py----------------------
>
> -----------------Output example----------------------
> Python 1.5.2 (#0, May 22 2000, 17:17:30) [MSC 32 bit (Intel)] on win32
> Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
> >>> import test_py_cpp
> Testing DerivedFromFoo
> ----------------------
> dir(df): []
> dir(DerivedFromFoo): []
> df.__dict__:
> Error: Type exceptions.AttributeError value __dict__
> df.fred.__doc__:
> Error: Type exceptions.AttributeError value 'class py::BoundFunction'
object has no attribute '__doc__'
>
> Testing DerivedFromBase
> -----------------------
> dir(db): []
> dir(DerivedFromBase): ['__doc__', '__module__', 'fred',
'i_am_derived_from_base']
> db.__dict__: {}
> db.fred.__doc__: Docs for DerivedFromBase.fred
> >>>
> -----------------Output example----------------------
>
> > -----Original Message-----
> > From: c++-sig-admin_at_[hidden] [mailto:c++-sig-admin_at_[hidden]]On
> > Behalf Of David Abrahams
> > Sent: 16 October 2000 03:18
> > To: Xavier Defrang; Ullrich Koethe; Prabhu Ramachandran; Niklas
> > Blomberg; Chuck_Ingold_at_[hidden]; c++-sig_at_[hidden];
> > boost_at_[hidden]; Anton Gluck; Ralf W. Grosse-Kunstleve
> > Subject: [C++-SIG] py_cpp update
> >
> >
> > An update of py_cpp has been posted to
> > http://people.ne.mediaone.net/abrahams/downloads/py_cpp.html.
> >
> > The main focus of this update is revised and expanded documentation (a
work
> > still in progress). Changes to the code were minimal.
> >
> > The boost review period for py_cpp ends 19 Oct. I hope that if you are
> > interested in this library you will join the boost mailing list at
> > www.egroups.com and participate in the open-source feedback loop.
> >
> > Thanks,
> > Dave
> >
> >
> >
> > _______________________________________________
> > C++-SIG maillist  -  C++-SIG_at_[hidden]
> > http://www.python.org/mailman/listinfo/c++-sig
> >
>
>
>