Jim wrote:
"
I'm new to this list so I'm sorry if this has been answered recently (I
did a search through the archive and it didn't come up with anything).
Anyway, I'm having a problem with the command history in Jython. When I
hit the up arrow, instead of getting my previous commands, I get ^[OA.
Command history works correctly in CPython 2.0. Is this feature
supported in Jython?
I'm running on JDK 1.3 (Blackdown 1.3.0 FCS).
Any suggestions?
"
This was answered recently on the (gradually more defunct) JPython list,
more info will be in that archive:
> -----Original Message-----
> From: Robert W. Bill [SMTP:rb...@di...]
> Sent: Sunday, January 07, 2001 12:47 AM
> To: Steve Cohen
> Cc: jpy...@py...
> Subject: Re: [JPython] jpython interpreter under linux
>
> On Sat, 6 Jan 2001, Steve Cohen wrote:
> > I am trying to run jpython interactively from a pc at home. I am used
> > to running it at work under NT 2000, where it works quite nicely. At
> > home, though, I have a PC on which I can run either Windows 98 or Red
> > Hat LInux 6.2. Forget Win98, it doesn't have a console worth messing
> > with, total crap.
> >
> > Under Linux, there are several console programs. The default one,
> > kvt, konsole, the Gnome shell and more. All have the same problem
> > with jpython. Something is causing the interactive jpython program
> > not to recognize the up and down arrow keys as requests for the
> > previous/next command in the history. This does not happen when the
> > shells are just at system command line mode (shell is bash), nor does
> > it happen under CPython. In both of these cases the arrow keys work
> > as expected. But when JPython is running, pressing them gets output
> > like [[A or something similar.
> >
> > Is there a fix to this? Or how about a workaround, another way to
> > access the history functions?
>
> Hello Steve,
>
> What enables the up-down arrow history keys is the readline module. This
> is compiled into your CPython, and all the shells you mention. Readline
> is not available for JPython so the arrow keys do not work. It's not a
> matter of JPython looking to the shell for this, because it cannot, as
> CPython cannot, but rather a matter of looking at the compiled-in readline
>
> which CPython can, but Jython cannot.
>
> Although what your thinking of is sensible- a shell the wraps the running
> process. I know Yorick has one, and there may be others, but emacs is a
> great solution for Linux. If you start emacs and windows, go into shell
> mode, start Jython- *then* you have up-down arrow readline history with
> the Jython intereactive console (and cool editor).
>
> Regards,
> Robert
>
>
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