Re: [Jython-users] Issue with Java RPC-JSON package / TypeError: 'NoneType' object is not callable

[Alex G. <ale...@ne...>]

09.05.2014 20:40, cl...@br... kirjoitti:
> Dear colleagues,
>
> Testing a Java RPC-JSON package under Jython 2.7 beta 1. One of the 
> classes with an empty argument input list, throws and error:
>
>  invoker = JsonRpcInvoker()
> TypeError: 'NoneType' object is not callable
>
> The Java equivalent is: JsonRpcInvoker invoker = new JsonRpcInvoker();
> The import of the class seems to work OK.
>
> Code:
> --------
> ..
> sys.path.append(userdir + "/jsonrpc-1.0/jsonrpc-1.0-client.jar")
> from org.json.rpc.client import *
> ..
>         url = "http://localhost:8080/jsonrpc"
>         transport = HttpJsonRpcClientTransport(URL(url))
>         invoker = JsonRpcInvoker()                # <======= this line 
> is causing the error:
>         calc = invoker.get(transport, "calc", Calculator.class)
>         result = calc.add(1, 2)
>         print "Result = " + str(3)
>
> Any idea what's wrong with the instantiation of this Java class, or 
> how to fix it, or is it related to the dynamic class loader?
Strange that you're not getting a syntax error from this because "class" 
is a reserved keyword in Python so "Calculator.class" cannot possibly work.
That said, have you checked that JsonRpcInvoker is not actually None 
(for whatever reason)?
>
> I've also tried with .newInstance() which also throws the same error.
>
> Regards,
> Claude
>
> *
> Claude Falbriard
> Certified IT Specialist L2 - Middleware
> AMS Hortolândia / SP - Brazil
> phone:    +55 13 9 9760 0453
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> e-mail:    cl...@br...
> *
>
>
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