[BUG] TypeError not callable : rich.print_exception

[yoann9344]

Hello !

Describe the bug
I use print_exception with uvicorn and print_exception got an exception "Field not Callable", I patched uvicorn/protocols/http/httptools_impl.py:404 this way

        except BaseException as exc:
            msg = "Exception in ASGI application\n"
            # PATCH start
            from rich.console import Console

            self.console = Console()
            self.console.print_exception(extra_lines=5, show_locals=True)
            # PATCH end
            self.logger.error(msg, exc_info=exc)
            if not self.response_started:
                await self.send_500_response()
            else:
                self.transport.close()

The exception which occured (the first part is the error in my side ; the second is the error in rich, both printed by uvicorn)

future: <Task finished name='Task-5' coro=<RequestResponseCycle.run_asgi() done, defined at .venv/lib/python3.9/site-packages/uvicorn/protocols/http/httptools_impl.py:396> exception=TypeError("'Field' object is not callable")>
Traceback (most recent call last):
  File ".venv/lib/python3.9/site-packages/uvicorn/protocols/http/httptools_impl.py", line 398, in run_asgi
    result = await app(self.scope, self.receive, self.send)
  File ".venv/lib/python3.9/site-packages/uvicorn/middleware/proxy_headers.py", line 45, in __call__
    return await self.app(scope, receive, send)
  File ".venv/lib/python3.9/site-packages/fastapi/applications.py", line 199, in __call__
    await super().__call__(scope, receive, send)
  File ".venv/lib/python3.9/site-packages/starlette/applications.py", line 112, in __call__
    await self.middleware_stack(scope, receive, send)
  File ".venv/lib/python3.9/site-packages/starlette/middleware/errors.py", line 181, in __call__
    raise exc from None
  File ".venv/lib/python3.9/site-packages/starlette/middleware/errors.py", line 159, in __call__
    await self.app(scope, receive, _send)
  File ".venv/lib/python3.9/site-packages/starlette/exceptions.py", line 82, in __call__
    raise exc from None
  File ".venv/lib/python3.9/site-packages/starlette/exceptions.py", line 71, in __call__
    await self.app(scope, receive, sender)
  File ".venv/lib/python3.9/site-packages/starlette/routing.py", line 580, in __call__
    await route.handle(scope, receive, send)
  File ".venv/lib/python3.9/site-packages/starlette/routing.py", line 241, in handle
    await self.app(scope, receive, send)
  File ".venv/lib/python3.9/site-packages/starlette/routing.py", line 52, in app
    response = await func(request)
  File ".venv/lib/python3.9/site-packages/fastapi/routing.py", line 201, in app
    raw_response = await run_endpoint_function(
  File ".venv/lib/python3.9/site-packages/fastapi/routing.py", line 148, in run_endpoint_function
    return await dependant.call(**values)
  File "./openapi_server/utils/routes.py", line 26, in filter_fields
    response = await func(*args, **kwargs)
  File "./openapi_server/apis/geographic_address_api.py", line 74, in list_geographic_address
    return await handler.objects()
  File "business/business/handlers/handler.py", line 39, in objects
    query_set = await self.query_set.limit(self.limit)
  File ".venv/lib/python3.9/site-packages/tortoise/queryset.py", line 900, in __await__
    self._make_query()
  File ".venv/lib/python3.9/site-packages/tortoise/queryset.py", line 862, in _make_query
    self.resolve_filters(
  File ".venv/lib/python3.9/site-packages/tortoise/queryset.py", line 129, in resolve_filters
    modifier &= node.resolve(model, annotations, custom_filters, model._meta.basetable)
  File ".venv/lib/python3.9/site-packages/tortoise/query_utils.py", line 390, in resolve
    return self._resolve_kwargs(model, table)
  File ".venv/lib/python3.9/site-packages/tortoise/query_utils.py", line 344, in _resolve_kwargs
    key, value = self._get_actual_filter_params(model, raw_key, raw_value)
  File ".venv/lib/python3.9/site-packages/tortoise/query_utils.py", line 338, in _get_actual_filter_params
    raise FieldError(f"Unknown filter param '{key}'. Allowed base values are {allowed}")
tortoise.exceptions.FieldError: Unknown filter param 'buildings__id'. Allowed base values are ['X', 'Y', 'buildings_FR', 'coverage_infra_ftto_FR', 'id', 'numéro', 'répétiteur', 'voie', 'voie_id']

Traceback (most recent call last):
  File ".venv/lib/python3.9/site-packages/uvicorn/protocols/http/httptools_impl.py", line 404, in run_asgi
    self.console.print_exception(extra_lines=5, show_locals=True)
  File ".venv/lib/python3.9/site-packages/rich/console.py", line 1719, in print_exception
    traceback = Traceback(
  File ".venv/lib/python3.9/site-packages/rich/traceback.py", line 223, in __init__
    trace = self.extract(
  File ".venv/lib/python3.9/site-packages/rich/traceback.py", line 350, in extract
    locals={
  File ".venv/lib/python3.9/site-packages/rich/traceback.py", line 351, in <dictcomp>
    key: pretty.traverse(
  File ".venv/lib/python3.9/site-packages/rich/pretty.py", line 686, in traverse
    node = _traverse(_object, root=True)
  File ".venv/lib/python3.9/site-packages/rich/pretty.py", line 672, in _traverse
    child_node = _traverse(child)
  File ".venv/lib/python3.9/site-packages/rich/pretty.py", line 509, in _traverse
    args = list(iter_rich_args(obj.__rich_repr__()))
TypeError: 'Field' object is not callable

To Reproduce
It is complex to reproduce it :/ Maybe I could reproduce it, it seems to come from tortoise orm, I will try later.

Platform
Linux

Diagnose
I quickly fixed the problem (but it seems to reduce the quantity of details) by patching rich this way (rich/pretty.py:509) :

            # PATCH start
            # args = list(iter_rich_args(obj.__rich_repr__()))  # replaced line
            try:
                args = list(iter_rich_args(obj.__rich_repr__()))
            except TypeError:
                args = []
                # print("FAILLED")
            # PATCH end

[willmcgugan]

I'm guessing that Tortoise ORM does some magic which breaks the pretty printing. It appears as though __rich_repr__ exists and is not callable. Have you added a __rich_repr__ callable anywhere?

[yoann9344]

No, I have not used __rich_repr__ :

grep -r "__rich_repr__" .
./.venv/lib/python3.9/site-packages/rich/layout.py: ...
./.venv/lib/python3.9/site-packages/rich/color.py: ...
...

Then might it be a __getattr__ or __getattribute from Tortoise ORM ?

ps:

ic| obj: Table('FR_Addresses')
ic| obj.__dict__: {'_for': None,
                   '_for_portion': None,
                   '_query_cls': <class 'pypika.queries.Query'>,
                   '_schema': None,
                   '_table_name': 'FR_Addresses',
                   'alias': None}

pypika.queries.Table inherits from pypike.queries.Selectable which has a __getattr__ which try to convert the given name to a Field (our type error).
__getattr__ is decored by ignore_copy which prevents copy.

[yoann9344]

To reproduce the error :

from rich.console import Console

console = Console()


class Field:
    def __init__(self, name):
        self.name = name


class Table:
    def __getattr__(self, name):
        return Field(name)


if __name__ == "__main__":
    try:
        t = Table()
        raise BaseException("Whatever")
    except BaseException:
        console.print_exception(extra_lines=5, show_locals=True)

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[willmcgugan]

Please try v10.10.0 Fixes your example code.

[yoann9344]

Perfect ! I tried, it works smooth, thx :)