Re: Completion in python mode + IPython

[Ergus]

Hi Liu:

Your code works very well. May I suggest you to add it somewhere. If you
don't want it in the python-mode.el, at least in the documentation?

I think it is very useful and improves the user experience, specially
for users that want ipython like experience?

WDYT?

On Tue, Jan 14, 2025 at 05:35:58PM +0800, Liu Hui wrote:
> On Tue, Jan 14, 2025 at 5:06 AM Ergus <spacibba@aol.com> wrote:
> > Hi Liu:
> >
> > I totally understand the point.
> >
> > Whats was surprising for me is that the non-default options works way
> > better than the default one for users with Ipython.
> >
> > I tried already the links you share and sincerely the jedi completion is
> > still way worst than the IPython one.
> >
> > So, for the moment I will just disable the native completion and rely in
> > the legacy one.
>
> The native completion has some advantages, e.g. it can work in
> multi-line block, and it doesn't lead to discontinuous IPython In/Out
> prompts. If you like the IPython completion produced by
> 'python-shell-completion-setup-code', you can replace the default
> readline completer with a custom one.
>
> For example, you may add the following code to the PYTHONSTARTUP file,
> which should provide same IPython completions as the legacy one.
>
> ──────────────────✀──────────────────
>
> def my_setup_IPythonRL():
>    import readline, re, json
>
>    def filter_c(prefix, c):
>        if re.match('_+(i?[0-9]+)?$', c):
>            return False
>        elif c[0] == '%' and not re.match('[%a-zA-Z]+$', prefix):
>            return False
>        return True
>
>    class IPythonRL:
>        def complete(self, text, state):
>            if state == 0:
>                try:
>                    from IPython.core.completer import provisionalcompleter
>                    with provisionalcompleter():
>                        self.matches = [json.dumps([
>                            [c.text, c.start, c.end, c.type or '?',
> c.signature or '']
>                            for c in
> get_ipython().Completer.completions(text, len(text))
>                            if filter_c(text, c.text)])]
>                except Exception:
>                    pass
>            try:
>                return self.matches[state]
>            except IndexError:
>                return None
>
>    readline.set_completer(IPythonRL().complete)
>    readline.parse_and_bind("tab: complete")
>    readline.parse_and_bind("set completion-ignore-case on")
>    readline.parse_and_bind("set show-all-if-unmodified")
>    readline.parse_and_bind("set show-all-if-ambiguous on")
>    readline.parse_and_bind('set colored-completion-prefix off')
>    readline.parse_and_bind('set colored-stats off')
>    readline.parse_and_bind("set completion-prefix-display-length 2")
>    readline.set_completer_delims('')
>
>
> try:
>    __IPYTHON__
>    import os
>    if os.getenv('INSIDE_EMACS'):
>        print('REPL completion using custom IPython completer')
>        my_setup_IPythonRL()
> except NameError:
>    try:
>        from jedi.utils import setup_readline
>    except ImportError:
>        pass
>    else:
>        setup_readline()
>
> ──────────────────✀──────────────────