jython-users

[Jython-users] java.lang.Object ctor failed!?

[dman <ds...@ri...>]

Having identified the use of a Python package as the previous source
of java->python interaction, I moved all the modules into one
top-level directory (non-package).

Now I get the following :

Traceback (most recent call last):
  File "/home/dman/School/Architecture/project2/src/DemoFolder1.py", line 0, in make
TypeError: Default constructor failed for Java superclass AbstractFolder


This happens in the python code where the Folder class is
instantiated.  I can change the base class of Folder to
java.lang.Object, and also comment out the entire __init__ method
(except for a 'pass' line) and I get the same result (with Object
instead of AbstractFolder as the superclass).

I tried munging the jythonc-generated source a bit to remove calls to
super() and catching all throwables that __initProxy__ might throw,
and adjusting the superclass, but all resulted in the same error.

Any ideas?

-D

[Jython-users] Jython adn Python libraries

[Ronald D S. <rd...@ea...>]

Will the Python libraries work well with Jython? I am particularly interested in whether urllib 
works under Jython. In other words, will a Python program that uses urllib but is otherwise pretty 
simple and straightforward be likely to work as a Java program after being complied using 
jythonc?

Ron Stephens
http://www.awaretek.com

Re: [Jython-users] Jython adn Python libraries

[Robert W. B. <rb...@di...>]

On Sat, 3 Nov 2001, Ronald D Stephens wrote:
> Will the Python libraries work well with Jython? I am particularly interested in whether urllib
> works under Jython. In other words, will a Python program that uses urllib but is otherwise pretty
> simple and straightforward be likely to work as a Java program after being complied using
> jythonc?
>
> Ron Stephens
> http://www.awaretek.com

Yes, something using urllib is likely to work as a Java program when
statically compiled with jythonc.  There's always exceptions of course,
like some methods are trouble in an applet (e.g. retrieve won't work as an
applet because it opens a file, and applets don't normally have access to
the local filesystem).

-robert

Re: [Jython-users] java.lang.Object ctor failed!?

[<bc...@wo...>]

[dman]

>Having identified the use of a Python package as the previous source
>of java->python interaction, I moved all the modules into one
>top-level directory (non-package).
>
>Now I get the following :
>
>Traceback (most recent call last):
>  File "/home/dman/School/Architecture/project2/src/DemoFolder1.py", line 0, in make
>TypeError: Default constructor failed for Java superclass AbstractFolder
>
>
>This happens in the python code where the Folder class is
>instantiated.  I can change the base class of Folder to
>java.lang.Object, and also comment out the entire __init__ method
>(except for a 'pass' line) and I get the same result (with Object
>instead of AbstractFolder as the superclass).
>
>I tried munging the jythonc-generated source a bit to remove calls to
>super() and catching all throwables that __initProxy__ might throw,
>and adjusting the superclass, but all resulted in the same error.
>
>Any ideas?

Do yuo have a small self contained example? It will make it a lot easier
to analyse.

regards,
finn