Pyreadline doesn't properly handle parenthesis

[Rudedog9d]

It looks like pyreadline doesn't properly handle a parenthesis when using readline.get_begidx() and readline.get_endidx(). This manifests when trying to tab complete an option that contain a parenthesis, ex:

# Create a new macro with a paren
macro test(
Beginning macro, use the 'end' command to save.
> echo hello world
> end
# tab complete showing them
macro --show test(<TAB> # all macros will be tab completed

The problem for us is inside shell.py:complete():

            # begidx and endidx are set to the same, 
            # so prefix is set to an empty string and passed to the completer
            begidx = readline.get_begidx()
            endidx = readline.get_endidx()
            line = readline.get_line_buffer()
            prefix = line[begidx:endidx] if line else ''
            line = line[:endidx]
            self.completion_matches = self.get_completions(line, prefix)

[ameily]

Readline splits on special characters, which you can view with:

>>> readline.get_completer_delims()
' \t\n"\\\'`@$><=;|&{('

The open paren character is in the completer delims. So, you can try to just remove the open paren character to see if that fixes the issue.

delims = readline.get_completer_delims().replace('(', '')
readline.set_completer_delims(delims)

I would be reluctant to modify pypsi and would instead advise that you change your shell subclass to set the readline completer delims.