Re: [Jython-users] OSError: [Errno 0] chdir not supported in Java?

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

[Dinu Gherman]

>Hi, 
>
>I'm just starting to use Jython on OS X and run into several
>problems, obne of them being this:
>
>[localhost:~] dinu% jython
>Jython 2.1 on java1.3.1 (JIT: null)
>Type "copyright", "credits" or "license" for more information.
>>>> import os
>>>> os.chdir('..')
>Traceback (innermost last):
>  File "<console>", line 1, in ?
>  File "/Applications/Additions/Jython-2.1/Lib/javaos.py", line 56, in chdir
>OSError: [Errno 0] chdir not supported in Java: ..
>>>> 
>
>Any ideas? 

As Samuele has explained, we can't do a chdir in 100% java and we will
*never* include JNI code with the jython distribution.

But we could (as we already do for the readline module) include support
code that require the presence of a JNI module to work. So if anybody
needed chdir() or chmod() or the full stat() values badly enough, she
could create a copy of the javaos.py module that used one of the JNI
module (there are several such candidates). 

We could then add a mechanisme to jython (in the registry) that allowed
users to choose either the existing 100% pure java version of "os" or
one the JNI alternatives.

The fact that I haven't maintained jnios for quite a while should be a
good indication that I don't need chdir() myself.

regards,
finn