Error in llm chat due to invalid key \e[d from case conversion in key bindings (Windows 11)

Description:

I'm encountering an error when running the llm chat command on Windows. The error appears to be related to key bindings in the pyreadline3 library, where key descriptions are converted to lowercase, causing certain keys to be unrecognized.

Error Message:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Scripts\llm.exe\__main__.py", line 7, in <module>
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 1078, in main
    rv = self.invoke(ctx)
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\click\core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\llm\cli.py", line 346, in chat
    readline.parse_and_bind("\\e[D: backward-char")
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyreadline3\rlmain.py", line 114, in parse_and_bind
    self.mode._bind_key(key, func)
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyreadline3\modes\basemode.py", line 176, in _bind_key
    keyinfo = make_KeyPress_from_keydescr(key.lower()).tuple()
  File "C:\Users\username\AppData\Local\Programs\Python\Python312\Lib\site-packages\pyreadline3\keysyms\common.py", line 191, in make_KeyPress_from_keydescr
    raise IndexError("Not a valid key: '%s'" % keydescr)
IndexError: Not a valid key: '\e[d'

Steps to Reproduce:

Install the llm package on a Windows machine.
Run the command:

llm chat -m gpt-4o

Analysis:

The error seems to originate from the llm package attempting to bind key sequences using readline.parse_and_bind. Specifically, in llm/cli.py:

readline.parse_and_bind("\\e[D: backward-char")

In the pyreadline3 library used on Windows, the _bind_key method in basemode.py converts the key description to lowercase:

Copy code
keyinfo = make_KeyPress_from_keydescr(key.lower()).tuple()

This conversion changes '\e[D' to '\e[d', which is not recognized by pyreadline3, leading to the IndexError.

Environment:

OS: Windows 11
Python Version: 3.12.7
llm Version: 0.16
pyreadline3 Version: 3.5.4

Additional Info

The issue seems specific to Windows due to differences in how key inputs are handled compared to Unix-like systems according to chatgpt.

It also suggested to use prompt_toolkit instead of pyreadline3 but it might be a huge change.

Start in llm/cli.py at the readline.parse_and_bind call and reproduce the failure with llm chat -m gpt-4o on Windows 11. Check how the installed pyreadline3 version handles the key sequence and determine a compatible fix. Done means the command starts without the IndexError and key bindings work on Windows.