metaclass error

[asteele@berkeley.edu]

dear readers,

i have a very simple package organized as follows:

!-----------------------------------------!
bgp/
__init__.py
managers/
__init__.py
ManagerInterfac e.py
TestManager.py
!-----------------------------------------!

and here's ManagerInterfac e.py and TestManager.py:

!-----------------------------------------!
# ManagerInterfac e.py
class ManagerInterfac e(object):
def __init__(self): pass
def process(self, recset, operation):
print 'In ManagerInterfac e.process()...'

# TestManager.py
import ManagerInterfac e
class TestManager(Man agerInterface):
def process(self, recset, operation):
print 'In TestManager.pro cess()...'
super(TestManag er,self).proces s(recset,operat ion)
!-------------------------------------------!

when i try to import the TestManager module via the interpreter, i get
the following error:

!-------------------------------------------!
$ python
Python 2.4.1c1 (#1, Mar 14 2005, 10:28:18)
[GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-49)] on linux2[color=blue][color=green][color=darkred]
>>> import bgp.managers.Te stManager[/color][/color][/color]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "bgp/managers/TestManager.py" , line 2, in ?
class TestManager(Man agerInterface):
TypeError: Error when calling the metaclass bases
module.__init__ () takes at most 2 arguments (3 given)
!-------------------------------------------!

any thoughts? i think that when python executes the TestManager class
statement, it collects the base class (ManagerInterfa ce) into a tuple
and then executes the class body in a dictionary... is this where the
error is happening?

thanks!
aaron

[F. Petitjean]

Re: metaclass error

Le 17 Mar 2005 12:27:07 -0800, asteele@berkele y.edu a écrit :[color=blue]
> dear readers,
>
> i have a very simple package organized as follows:
>
> !-----------------------------------------!
> bgp/
> __init__.py
> managers/
> __init__.py
> ManagerInterfac e.py
> TestManager.py
> !-----------------------------------------!
>
> and here's ManagerInterfac e.py and TestManager.py:
>
> !-----------------------------------------!
> # ManagerInterfac e.py
> class ManagerInterfac e(object):
> def __init__(self): pass
> def process(self, recset, operation):
> print 'In ManagerInterfac e.process()...'
>
> # TestManager.py
> import ManagerInterfac e[/color]
# ManagerInterfac e is a module not a class !
# try
from ManagerInterfac e import ManagerInterfac e[color=blue]
> class TestManager(Man agerInterface):[/color]
# you can also define __init__ method with a super call[color=blue]
> def process(self, recset, operation):
> print 'In TestManager.pro cess()...'
> super(TestManag er,self).proces s(recset,operat ion)
> !-------------------------------------------!
>
>
> thanks!
> aaron
>[/color]

[asteele@berkeley.edu]

Re: metaclass error

doh, that was the problem. :}

thanks for the help!
aaron

[Michele Simionato]

Re: metaclass error

F. Petitijean:[color=blue]
> ManagerInterfac e is a module not a class ![/color]

Yes, but the error message could be improved (at least for the sake of
people
not knowing the internal working of Python). Do you care to fill a bug
report?

Michele Simionato