Incompatibility between openai and fastapi #1454
Description
Confirm this is an issue with the Python library and not an underlying OpenAI API
- This is an issue with the Python library
Describe the bug
Using openai python library with fastapi throws a pydantic error. python '3.12.3', fastapi '0.111.0', openai '1.30.4' (although the same happens with python 3.8 and 3.10)
Simply try and define an endpoint that uses CompletionCreateParams. See stack trace in code section
To Reproduce
$ python3.12 -m venv 3.12venv
$ source 3.12venv/bin/activate
$ pip install fastapi
$ pip install openai
$ python
>>> from fastapi import FastAPI
>>> from openai.types.chat import CompletionCreateParams
>>> app = FastAPI()
>>> @app.post("/v1/chat/completions")
... def chat_completions(r: CompletionCreateParams):
... pass
Code snippets
Traceback (most recent call last):
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/type_adapter.py", line 210, in __init__
core_schema = _getattr_no_parents(type, '__pydantic_core_schema__')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/type_adapter.py", line 98, in _getattr_no_parents
raise AttributeError(attribute)
AttributeError: __pydantic_core_schema__
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/fastapi/routing.py", line 944, in decorator
self.add_api_route(
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/fastapi/routing.py", line 883, in add_api_route
route = route_class(
^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/fastapi/routing.py", line 513, in __init__
self.dependant = get_dependant(path=self.path_format, call=self.endpoint)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/fastapi/dependencies/utils.py", line 261, in get_dependant
type_annotation, depends, param_field = analyze_param(
^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/fastapi/dependencies/utils.py", line 444, in analyze_param
field = create_response_field(
^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/fastapi/utils.py", line 99, in create_response_field
return ModelField(**kwargs) # type: ignore[arg-type]
^^^^^^^^^^^^^^^^^^^^
File "<string>", line 6, in __init__
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/fastapi/_compat.py", line 109, in __post_init__
self._type_adapter: TypeAdapter[Any] = TypeAdapter(
^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/type_adapter.py", line 212, in __init__
core_schema = _get_schema(type, config_wrapper, parent_depth=_parent_depth + 1)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/type_adapter.py", line 81, in _get_schema
schema = gen.generate_schema(type_)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 502, in generate_schema
schema = self._generate_schema_inner(obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 737, in _generate_schema_inner
return self._annotated_schema(obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 1757, in _annotated_schema
schema = self._apply_annotations(source_type, annotations)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 1825, in _apply_annotations
schema = get_inner_schema(source_type)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_schema_generation_shared.py", line 82, in __call__
schema = self._handler(source_type)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 1907, in new_handler
schema = metadata_get_schema(source, get_inner_schema)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 1903, in <lambda>
lambda source, handler: handler(source)
^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_schema_generation_shared.py", line 82, in __call__
schema = self._handler(source_type)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 1806, in inner_handler
schema = self._generate_schema_inner(obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 758, in _generate_schema_inner
return self.match_type(obj)
^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 840, in match_type
return self._match_generic_type(obj, origin)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 864, in _match_generic_type
return self._union_schema(obj)
^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 1152, in _union_schema
choices.append(self.generate_schema(arg))
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 502, in generate_schema
schema = self._generate_schema_inner(obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 758, in _generate_schema_inner
return self.match_type(obj)
^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 806, in match_type
return self._typed_dict_schema(obj, None)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_generate_schema.py", line 1254, in _typed_dict_schema
for field_name, annotation in get_type_hints_infer_globalns(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/LarryMartell/dispatcher/3.12venv/lib/python3.12/site-packages/pydantic/_internal/_fields.py", line 56, in get_type_hints_infer_globalns
return get_type_hints(obj, globalns=globalns, localns=localns, include_extras=include_extras)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/typing.py", line 2244, in get_type_hints
value = _eval_type(value, base_globals, base_locals)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/typing.py", line 414, in _eval_type
return t._evaluate(globalns, localns, recursive_guard)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/typing.py", line 924, in _evaluate
eval(self.__forward_code__, globalns, localns),
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<string>", line 1, in <module>
TypeError: 'pydantic_core._pydantic_core.PydanticUndefinedType' object is not subscriptable
### OS
macOS 14.4.1
### Python version
3.12.3
### Library version
1.30.4