Summary
Passing choices= to an option and typing it as Literal fails WHEN not passing input_type
Reproduction Steps
Add the command below as-is to your bot, and run it
Minimal Reproducible Code
@slash_command()
@option(
"test",
choices=["jpeg", "png", "gif", "webp", "tiff", "bmp"],
)
async def convert(
self,
ctx: discord.ApplicationContext,
test: Literal["jpeg", "png", "gif", "webp", "tiff", "bmp"],
) -> None:
...Expected Results
The option decorator should ignore the typing in the code when using the decorator, so it doesn't matter what it's typed as
Actual Results
The option decorator is confused by the Literal[] typing and fails to decide on what to do, seemingly
Intents
all
System Information
- Python v3.13.11-final
- py-cord v2.7.None-final
- aiohttp v3.13.3
- system info: Windows 11 10.0.26200
Checklist
Additional Context
Traceback:
Traceback (most recent call last):
File "C:\Code\versa\.venv\Lib\site-packages\discord\cog.py", line 809, in _load_from_module_spec
spec.loader.exec_module(lib) # type: ignore
~~~~~~~~~~~~~~~~~~~~~~~^^^^^
File "<frozen importlib._bootstrap_external>", line 1023, in exec_module
File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
File "C:\Code\versa\src\cogs\slash_commands.py", line 13, in <module>
class SlashCommands(discord.Cog, name="slash_commands"):
...<72 lines>...
return buffer
File "C:\Code\versa\src\cogs\slash_commands.py", line 19, in SlashCommands
@option(
~~~~~~^
"target_filetype",
^^^^^^^^^^^^^^^^^^
description="The filetype to convert to",
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
choices=["jpeg", "png", "gif", "webp", "tiff", "bmp"],
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "C:\Code\versa\.venv\Lib\site-packages\discord\commands\options.py", line 553, in decorator
func.__annotations__[resolved_name] = Option(itype, name=name, **kwargs)
~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Code\versa\.venv\Lib\site-packages\discord\commands\options.py", line 287, in __init__
raise exc
File "C:\Code\versa\.venv\Lib\site-packages\discord\commands\options.py", line 282, in __init__
self.input_type = SlashCommandOptionType.from_datatype(input_type)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^
File "C:\Code\versa\.venv\Lib\site-packages\discord\enums.py", line 863, in from_datatype
if isinstance(datatype, str) or issubclass(datatype, str):
~~~~~~~~~~^^^^^^^^^^^^^^^
TypeError: issubclass() arg 1 must be a classAn important note is that when explicitly passing input_type to the option (in this case, str), the given code works. input_type defaults to string by default. I think the solution is to have input_type always fall back to string unless another Discord-compatible option type is present as the function argument type, e.g. int / float.
Summary
Passing choices= to an option and typing it as Literal fails WHEN not passing input_type
Reproduction Steps
Add the command below as-is to your bot, and run it
Minimal Reproducible Code
Expected Results
The option decorator should ignore the typing in the code when using the decorator, so it doesn't matter what it's typed as
Actual Results
The option decorator is confused by the Literal[] typing and fails to decide on what to do, seemingly
Intents
all
System Information
Checklist
Additional Context
Traceback:
An important note is that when explicitly passing
input_typeto the option (in this case,str), the given code works.input_typedefaults to string by default. I think the solution is to haveinput_typealways fall back to string unless another Discord-compatible option type is present as the function argument type, e.g. int / float.