[Pythonmac-SIG] readline support for OS X Leopard

[Noah Gift]

I was just going to say the same thing.  Getting this to work and then GVim,
and I will be quite happy.

On 10/26/07, Boyd Waters <bwaters at nrao.edu> wrote:
>
> Oops, I spoke too soon when I said that readline support with
> Leopard's Python works for me with IPython.
>
> Many things DO work, but tab-completion does NOT.
>
> I am trying to get tab completion working.
>
> Forget IPython, just try this "unit test" of rlcompleter with the
> Python that ships with Leopard:
>
> See http://docs.python.org/lib/module-rlcompleter.html
>
>   Launch python from a Terminal shell prompt.
>   at the prompt, type the following commands:
>   import rlcompleter
>   import readline
>   readline.parse_and_bind("tab: complete")
>
>   Now, try it out: start some input, then hit the Tab key to get some
> possible completions:
>
>   readline. <TAB PRESSED>
>
>   The tab is passed as raw input, and the completer does not give any
> completions.
>
>   Tried with both Terminal and xterm.
>
>
> Reported as Apple Bug # 5563035
>
> I've also asked the IPython devs for help - and volunteered to get
> this resolved somehow for them -- but I don't think it's an IPython
> problem (since you can do this from "raw" interactive python).
>
> Here's hoping...
>
>
>   - boyd
>
>
> Boyd Waters
> Mac Programmer
> National Radio Astronomy Observatory
> http://www.aoc.nrao.edu/~bwaters
>
>
> On Oct 22, 2007, at 12:35 PM, Noah Gift wrote:
>
> > Edward,
> >
> > Thanks for the information.  Do you know of a way to get IPython to
> > use edline instead?  IPython is growing in popularity for Python
> > programmers, and it seems like getting a way forward that works with
> > edline makes sense, or maybe I am wrong and people will need to just
> > manually install readline themselves.
> >
> > Noah
> >
> > On 10/22/07, Edward Moy <emoy at apple.com> wrote:
> > On Oct 21, 2007, at 10:51 PM, Noah Gift wrote:
> >
> >> I have been getting ready for the official leopard release in a few
> >> days, and have been a bit worried about readline support.  I forgot
> >> what I did to get it to work for IPython, which I absolutely cannot
> >> live without anymore.  Is there a plan for a Leopard binary that
> >> fixes readline, or can I help someone prepare some documentation on
> >> getting readline working properly.  I don't have a lot of time
> >> during the next couple of weeks to get into compile hell, but if
> >> someone has any easy fix to get readline to work, I would greatly
> >> appreciate it.
> >
> >
> > The installed version of python on Leopard will actually have
> > readline support turned on by default, but it uses the EditLine
> > (libedit) library, not the GNU Readline (due to licensing reasons).
> > While functionally equivalent, the command syntax is different.
> > From the python(1) man page:
> >
> >
> > INTERACTIVE INPUT EDITING AND HISTORY SUBSTITUTION
> >        The Python inteterpreter supports editing of the current
> > input line and
> >        history substitution, similar to facilities found in the Korn
> > shell and
> >        the  GNU  Bash shell.  However, rather than being implemented
> > using the
> >        GNU Readline library, this Python interpreter  uses  the
> > BSD  EditLine
> >        library editline(3) with a GNU Readline emulation layer.
> >
> >
> >        The  readline  module  provides the access to the EditLine
> > library, but
> >        there are a few major differences compared to a traditional
> > implementa-
> >        tion  using  the  Readline  library.   The command language
> > used in the
> >        preference files is that of EditLine, as described in
> > editrc(5) and not
> >        that   used  by  the  Readline  library.   This  also  means
> > that  the
> >        parse_and_bind() routines uses EditLine commands.  And  the
> > preference
> >        file itself is ~/.editrc instead of ~/.inputrc.
> >
> >
> >        For  example,  the rlcompleter module, which defines a
> > completion func-
> >        tion for the  readline  modules,  works  correctly  with
> > the  EditLine
> >        libraries, but needs to be initialized somewhat differently:
> >
> >
> >               import rlcompleter
> >               import readline
> >               readline.parse_and_bind ("bind ^I rl_complete")
> >
> >
> >        For vi mode, one needs:
> >
> >
> >               readline.parse_and_bind("bind -v")
> >
> >
> >
> --------------------------------------------------------------------------
> > Edward Moy
> > Apple Computer, Inc.
> > emoy at apple.com
> >
> >
> >
> >
> > _______________________________________________
> > Pythonmac-SIG maillist  -  Pythonmac-SIG at python.org
> > http://mail.python.org/mailman/listinfo/pythonmac-sig
>
>
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