Re: [Jython-users] TypeError: _new_impl(): expected 2 args; got 1

[pratibha c. <pra...@gm...>]

i am using jython2.2 only. Is there any work around to fix this problem using
jython 2.2

Thanks in advance,
Pratibha.




Charlie Groves wrote:
> 
> On Wed, Nov 19, 2008 at 12:58 AM, pratibha chitipothu
> <pra...@gm...> wrote:
>>
>>   i am keep getting this error in jython 2.2
>>    'TypeError: _new_impl(): expected 2 args; got 1'
>>
>>   Sample Code
>>   class PyListWrapper(PythonObject):
>>
>>    def __init__(self, list_):
>>        self.list_ = list_
>>        PythonObject.__init__(self, self, self.tojava)
>>
>>   def tojava(self, clazz):
>>        print 'PyListWrapper.tojava', clazz
>>
>>   If i try to call PyListWrapper([1,2,3]), i am keep getting this error.
>> And it is not even entering into __init__ method.
>>  PythonObject class is a java class which is extended from python
>> PyObject
>> class.
>>  Same thing is working fine with jython 2.1.
> 
> In jython 2.2, python types built in Java changed from old-style
> classes to new-style.  This means that instead of just extending
> PyObject, they depend on a fair amount of generated code that bridges
> between Java and Python types.  In 2.5, we switched to a bytecode
> generation system based on Java annotations to do the same thing
> without requiring loads of boilerplate to be injected into the source.
> 
> If you need to continue subclassing PyObject in Java, I'd suggest
> moving to this new annotation system which has some documentation at
> http://wiki.python.org/jython/PythonTypesInJava.  However using that
> requires 2.5 which won't be out in a final form for a while now.  Why
> do you need to subclass Python types written in Java?  That's greatly
> more complicated than either subclassing a Java class or interface
> directly in Python, or writing a class in Python.
> 
> Charlie
> 
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