RE: [Jython-users] Static methods?

[Humbel O. <Otm...@bi...>]

[ Kevin Butler ]

> Jython 2.1a1 on java1.3.0 (JIT: null)
> Type "copyright", "credits" or "license" for more information.
> >>> class X:
> ...   def go( id ):
> ...     print "called:", id
> ...=20
> >>> X.go( "asdf" )
> Traceback (innermost last):
>   File "<console>", line 1, in ?
> TypeError: unbound method go() must be called with instance=20
> as first argument
> >>>
>=20
> The 'self' parameter is not a keyword - it is a convention. =20
> Methods on class X require an X instance:
>=20
> >>> X.go( X() )
> called: <__main__.X instance at 5991085>
> >>>=20
>=20
> What you can do is cheat in one of two ways:
>=20
> class XGo:
>     """Callable object to act as a static method"""
>     def __call__( self, id ):
>         print "called XGo(%s)" % id
>=20
> class XStatics:
>     def go( self, id ):
>         """Use the bound method as a static method"""
>         print "called XStatics.go(%s)" % id
>     # ... and other "static" methods
>=20
>=20
> class X:
>     go =3D XGo()
>     __xstatics =3D XStatics()
>     go2=3D__xstatics.go
>     # ... and other static methods
>=20
> X.go( "asdf" )
> X.go2( "zxcv")
>=20
> Then executing that from emacs:
>=20
> Jython 2.1a1 on java1.3.0 (JIT: null)
> Type "copyright", "credits" or "license" for more information.
> ## working on region in file d:/TEMP/python-289AX1...
> >>> called XGo(asdf)
> called XStatics.go(zxcv)
> >>>=20

Please **apologize** for confusing things. I currently use both Jython
and JPython in two (or more) buffers in emacs, and did not test my
example with Jython 2.x, because I simply could not imagine that THIS
behaviour could have changed - mea culpa !
Thank you very much for pointing out (and solving !) another upgrade
issue. I am already thinking about the regex expression to find def()'s
without self as first argument :-)

best wishes,
Oti.