FastAPI 和 Pydantic RecursionError 在 ASGI 应用程序中导致异常
FastAPI and Pydantic RecursionError Causing Exception in ASGI application
描述
我已经看到有关导致 RecursionError: maximum recursion depth exceeded in comparison 自引用 Pydantic 模型的类似问题，但据我所知，代码中没有包含自引用模型。我只是在使用 Pydantic 的 BaseModel class.
代码 运行 成功，直到下面 audit.py 中的函数尝试 return 模型的输出。
我已经包含了完整的回溯，因为我不确定从哪里开始这个错误。我有 运行 带有 PyCharm 而没有 IDE 的代码，它总是产生下面的回溯，但不会使应用程序崩溃，但 return 的 http 状态代码为 500到前端。
如有任何建议，我们将不胜感激。
按照建议，我也尝试 sys.setrecursionlimit(1500) 增加递归限制。
环境
- OS: Windows 10
- FastAPI 版本：0.61.1
- Pydantic 版本：1.6.1
- 独角兽版本：0.11.8
- Python版本：3.7.1
- Pycharm版本：2020.2
应用程序
main.py
import uvicorn
from fastapi import FastAPI
from starlette.middleware.cors import CORSMiddleware
from app.api.routes.router import api_router
from app.core.logging import init_logging
from app.core.config import settings
init_logging()
def get_app() -> FastAPI:
application = FastAPI(title=settings.APP_NAME, version=settings.APP_VERSION, debug=settings.DEBUG)
if settings.BACKEND_CORS_ORIGINS:
# middleware support for cors
application.add_middleware(
CORSMiddleware,
allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
application.include_router(api_router, prefix=settings.API_V1_STR)
return application
app = get_app()
if __name__ == "__main__":
uvicorn.run("main:app", host="127.0.0.1", port=80)
router.py
from fastapi import APIRouter
from app.api.routes import audit
api_router = APIRouter()
api_router.include_router(audit.router, tags=["audit"], prefix="/audit")
audit.py
import validators
from fastapi import APIRouter, HTTPException
from loguru import logger
from app.api.dependencies.audit import analyzer
from app.schemas.audit import AuditPayload, AuditResult
router = APIRouter()
@router.post("/", response_model=AuditResult, name="audit", status_code=200)
async def post_audit(payload: AuditPayload) -> AuditResult:
logger.info("Audit request received")
# validate URL
try:
logger.info("Validating URL")
validators.url(payload.url)
except HTTPException:
HTTPException(status_code=404, detail="Invalid URL.")
logger.exception("HTTPException - Invalid URL")
# generate output from route audit.py
logger.info("Running audit analysis. This could take up to 10 minutes. Maybe grab a coffee...")
analyzed_output = analyzer.analyze(url=payload.url,
brand=payload.brand,
twitter_screen_name=payload.twitter_screen_name,
facebook_page_name=payload.facebook_page_name,
instagram_screen_name=payload.instagram_screen_name,
youtube_user_name=payload.youtube_user_name,
ignore_robots=payload.ignore_robots,
ignore_sitemap=payload.ignore_sitemap,
google_analytics_view_id=payload.google_analytics_view_id)
output = AuditResult(**analyzed_output)
return output
audit_models.py
from pydantic import BaseModel
class AuditPayload(BaseModel):
url: str
brand: str
twitter_screen_name: str
facebook_page_name: str
instagram_screen_name: str
youtube_user_name: str
ignore_robots: bool
ignore_sitemap: bool
google_analytics_view_id: str
class AuditResult(BaseModel):
base_url: str
run_time: float
website_404: dict
website_302: dict
website_h1_tags: dict
website_duplicate_h1: dict
website_h2_tags: dict
website_page_duplications: dict
website_page_similarities: dict
website_page_desc_duplications: dict
website_page_title_duplications: dict
pages: list
pages_out_links_404: dict = None
pages_canonicals: dict
seo_phrases: dict
social: dict
google_analytics_report: dict
google_psi_desktop: dict
google_psi_mobile: dict
google_algo_updates: dict
google_sb: list
robots_txt: list
此行在日志中抛出错误：
2020-09-10 10:02:31.483 |错误 | uvicorn.protocols.http.h11_impl:run_asgi:391 - ASGI 应用程序异常
我认为这一点与理解为什么会发生此错误最相关：
File "pydantic\main.py", line 623, in pydantic.main.BaseModel._get_value
[Previous line repeated 722 more times]
完整追溯：
Traceback (most recent call last):
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\pydevconsole.py", line 483, in <module>
pydevconsole.start_client(host, port)
│ │ │ └ 50488
│ │ └ '127.0.0.1'
│ └ <function start_client at 0x000001BCEDC19D08>
└ <module 'pydevconsole' from 'C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-0\202.6948.78\pl...
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\pydevconsole.py", line 411, in start_client
process_exec_queue(interpreter)
│ └ <_pydev_bundle.pydev_ipython_console.InterpreterInterface object at 0x000001BCEDC1BF98>
└ <function process_exec_queue at 0x000001BCEDC19A60>
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\pydevconsole.py", line 258, in process_exec_queue
more = interpreter.add_exec(code_fragment)
│ │ └ <_pydev_bundle.pydev_console_types.CodeFragment object at 0x000001BCEDCFE748>
│ └ <function BaseCodeExecutor.add_exec at 0x000001BCECF38488>
└ <_pydev_bundle.pydev_ipython_console.InterpreterInterface object at 0x000001BCEDC1BF98>
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_bundle\pydev_code_executor.py", line 106, in add_exec
more = self.do_add_exec(code_fragment)
│ │ └ <_pydev_bundle.pydev_console_types.CodeFragment object at 0x000001BCEDCFE748>
│ └ <function InterpreterInterface.do_add_exec at 0x000001BCEDC15D90>
└ <_pydev_bundle.pydev_ipython_console.InterpreterInterface object at 0x000001BCEDC1BF98>
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_bundle\pydev_ipython_console.py", line 36, in do_add_exec
res = bool(self.interpreter.add_exec(code_fragment.text))
│ │ │ │ └ "runfile('E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py', wdir='E:/Users/<user>/Docume...
│ │ │ └ <_pydev_bundle.pydev_console_types.CodeFragment object at 0x000001BCEDCFE748>
│ │ └ <function _PyDevFrontEnd.add_exec at 0x000001BCEDC15A60>
│ └ <_pydev_bundle.pydev_ipython_console_011._PyDevFrontEnd object at 0x000001BCEDC350B8>
└ <_pydev_bundle.pydev_ipython_console.InterpreterInterface object at 0x000001BCEDC1BF98>
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_bundle\pydev_ipython_console_011.py", line 483, in add_exec
self.ipython.run_cell(line, store_history=True)
│ │ │ └ "runfile('E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py', wdir='E:/Users/<user>/Docume...
│ │ └ <function InteractiveShell.run_cell at 0x000001BCED5E7268>
│ └ <_pydev_bundle.pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x000001BCEDC350F0>
└ <_pydev_bundle.pydev_ipython_console_011._PyDevFrontEnd object at 0x000001BCEDC350B8>
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 2843, in run_cell
raw_cell, store_history, silent, shell_futures)
│ │ │ └ True
│ │ └ False
│ └ True
└ "runfile('E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py', wdir='E:/Users/<user>/Docume...
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 2869, in _run_cell
return runner(coro)
│ └ <generator object InteractiveShell.run_cell_async at 0x000001BCEDC49C78>
└ <function _pseudo_sync_runner at 0x000001BCED5D0C80>
File "C:\Program Files\Python37\lib\site-packages\IPython\core\async_helpers.py", line 67, in _pseudo_sync_runner
coro.send(None)
│ └ <method 'send' of 'generator' objects>
└ <generator object InteractiveShell.run_cell_async at 0x000001BCEDC49C78>
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 3044, in run_cell_async
interactivity=interactivity, compiler=compiler, result=result)
│ │ └ <ExecutionResult object at 1bcedcd3470, execution_count=2 error_before_exec=None error_in_exec=None info=<ExecutionInfo objec...
│ └ <IPython.core.compilerop.CachingCompiler object at 0x000001BCEDC356D8>
└ 'last_expr'
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 3215, in run_ast_nodes
if (yield from self.run_code(code, result)):
│ │ │ └ <ExecutionResult object at 1bcedcd3470, execution_count=2 error_before_exec=None error_in_exec=None info=<ExecutionInfo objec...
│ │ └ <code object <module> at 0x000001BCEDCDADB0, file "<ipython-input-2-086756a0f1dd>", line 1>
│ └ <function InteractiveShell.run_code at 0x000001BCED5E76A8>
└ <_pydev_bundle.pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x000001BCEDC350F0>
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 3291, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
│ │ │ │ └ {'__name__': 'pydev_umd', '__doc__': 'Automatically created module for IPython interactive environment', '__package__': None,...
│ │ │ └ <_pydev_bundle.pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x000001BCEDC350F0>
│ │ └ <property object at 0x000001BCED5D8958>
│ └ <_pydev_bundle.pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x000001BCEDC350F0>
└ <code object <module> at 0x000001BCEDCDADB0, file "<ipython-input-2-086756a0f1dd>", line 1>
File "<ipython-input-2-086756a0f1dd>", line 1, in <module>
runfile('E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py', wdir='E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app')
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_bundle\pydev_umd.py", line 197, in runfile
pydev_imports.execfile(filename, global_vars, local_vars) # execute the script
│ │ │ │ └ {'__name__': '__main__', '__doc__': "\nMain entry point into API for endpoints related to HawkSense's main functionality.\nto...
│ │ │ └ {'__name__': '__main__', '__doc__': "\nMain entry point into API for endpoints related to HawkSense's main functionality.\nto...
│ │ └ 'E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py'
│ └ <function execfile at 0x000001BCECC521E0>
└ <module '_pydev_bundle.pydev_imports' from 'C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-0\...
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
│ │ │ └ {'__name__': '__main__', '__doc__': "\nMain entry point into API for endpoints related to HawkSense's main functionality.\nto...
│ │ └ {'__name__': '__main__', '__doc__': "\nMain entry point into API for endpoints related to HawkSense's main functionality.\nto...
│ └ 'E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py'
└ '#!/usr/bin/env python\n\n"""\nMain entry point into API for endpoints related to HawkSense\'s main functionality.\ntodo: htt...
File "E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app\main.py", line 47, in <module>
uvicorn.run("main:app", host="127.0.0.1", port=80) # for debug only
│ └ <function run at 0x000001BCEDE041E0>
└ <module 'uvicorn' from 'C:\Program Files\Python37\lib\site-packages\uvicorn\__init__.py'>
File "C:\Program Files\Python37\lib\site-packages\uvicorn\main.py", line 362, in run
server.run()
│ └ <function Server.run at 0x000001BCEDE4B510>
└ <uvicorn.main.Server object at 0x000001BCFC722198>
File "C:\Program Files\Python37\lib\site-packages\uvicorn\main.py", line 390, in run
loop.run_until_complete(self.serve(sockets=sockets))
│ │ │ │ └ None
│ │ │ └ <function Server.serve at 0x000001BCEDE4B598>
│ │ └ <uvicorn.main.Server object at 0x000001BCFC722198>
│ └ <function BaseEventLoop.run_until_complete at 0x000001BCED49FE18>
└ <_WindowsSelectorEventLoop running=True closed=False debug=False>
File "C:\Program Files\Python37\lib\asyncio\base_events.py", line 560, in run_until_complete
self.run_forever()
│ └ <function BaseEventLoop.run_forever at 0x000001BCED49FD90>
└ <_WindowsSelectorEventLoop running=True closed=False debug=False>
File "C:\Program Files\Python37\lib\asyncio\base_events.py", line 528, in run_forever
self._run_once()
│ └ <function BaseEventLoop._run_once at 0x000001BCED4A27B8>
└ <_WindowsSelectorEventLoop running=True closed=False debug=False>
File "C:\Program Files\Python37\lib\asyncio\base_events.py", line 1764, in _run_once
handle._run()
│ └ <function Handle._run at 0x000001BCED43AB70>
└ <Handle <TaskStepMethWrapper object at 0x000001BCFC7D4B00>()>
File "C:\Program Files\Python37\lib\asyncio\events.py", line 88, in _run
self._context.run(self._callback, *self._args)
│ │ │ │ │ └ <member '_args' of 'Handle' objects>
│ │ │ │ └ <Handle <TaskStepMethWrapper object at 0x000001BCFC7D4B00>()>
│ │ │ └ <member '_callback' of 'Handle' objects>
│ │ └ <Handle <TaskStepMethWrapper object at 0x000001BCFC7D4B00>()>
│ └ <member '_context' of 'Handle' objects>
└ <Handle <TaskStepMethWrapper object at 0x000001BCFC7D4B00>()>
> File "C:\Program Files\Python37\lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 388, in run_asgi
result = await app(self.scope, self.receive, self.send)
│ │ │ │ │ │ └ <function RequestResponseCycle.send at 0x000001BCFC757840>
│ │ │ │ │ └ <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>
│ │ │ │ └ <function RequestResponseCycle.receive at 0x000001BCFC7578C8>
│ │ │ └ <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>
└ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x000001BCFC722BA8>
File "C:\Program Files\Python37\lib\site-packages\uvicorn\middleware\proxy_headers.py", line 45, in __call__
return await self.app(scope, receive, send)
│ │ │ │ └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <fastapi.applications.FastAPI object at 0x000001BCFC722710>
└ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x000001BCFC722BA8>
File "C:\Program Files\Python37\lib\site-packages\fastapi\applications.py", line 149, in __call__
await super().__call__(scope, receive, send)
│ │ └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>>
│ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
└ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
File "C:\Program Files\Python37\lib\site-packages\starlette\applications.py", line 102, in __call__
await self.middleware_stack(scope, receive, send)
│ │ │ │ └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <starlette.middleware.errors.ServerErrorMiddleware object at 0x000001BCFC7B8FD0>
└ <fastapi.applications.FastAPI object at 0x000001BCFC722710>
File "C:\Program Files\Python37\lib\site-packages\starlette\middleware\errors.py", line 181, in __call__
raise exc from None
File "C:\Program Files\Python37\lib\site-packages\starlette\middleware\errors.py", line 159, in __call__
await self.app(scope, receive, _send)
│ │ │ │ └ <function ServerErrorMiddleware.__call__.<locals>._send at 0x000001BCFC72AE18>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <starlette.middleware.cors.CORSMiddleware object at 0x000001BCFC7B8F60>
└ <starlette.middleware.errors.ServerErrorMiddleware object at 0x000001BCFC7B8FD0>
File "C:\Program Files\Python37\lib\site-packages\starlette\middleware\cors.py", line 84, in __call__
await self.simple_response(scope, receive, send, request_headers=headers)
│ │ │ │ │ └ Headers({'host': '127.0.0.1', 'connection': 'keep-alive', 'content-length': '295', 'accept': 'application/json', 'user-agent'...
│ │ │ │ └ <function ServerErrorMiddleware.__call__.<locals>._send at 0x000001BCFC72AE18>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <function CORSMiddleware.simple_response at 0x000001BCEE53DC80>
└ <starlette.middleware.cors.CORSMiddleware object at 0x000001BCFC7B8F60>
File "C:\Program Files\Python37\lib\site-packages\starlette\middleware\cors.py", line 140, in simple_response
await self.app(scope, receive, send)
│ │ │ │ └ functools.partial(<bound method CORSMiddleware.send of <starlette.middleware.cors.CORSMiddleware object at 0x000001BCFC7B8F60...
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <starlette.exceptions.ExceptionMiddleware object at 0x000001BCFC7B8E48>
└ <starlette.middleware.cors.CORSMiddleware object at 0x000001BCFC7B8F60>
File "C:\Program Files\Python37\lib\site-packages\starlette\exceptions.py", line 82, in __call__
raise exc from None
File "C:\Program Files\Python37\lib\site-packages\starlette\exceptions.py", line 71, in __call__
await self.app(scope, receive, sender)
│ │ │ │ └ <function ExceptionMiddleware.__call__.<locals>.sender at 0x000001BCFC7C18C8>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <fastapi.routing.APIRouter object at 0x000001BCFC7220F0>
└ <starlette.exceptions.ExceptionMiddleware object at 0x000001BCFC7B8E48>
File "C:\Program Files\Python37\lib\site-packages\starlette\routing.py", line 550, in __call__
await route.handle(scope, receive, send)
│ │ │ │ └ <function ExceptionMiddleware.__call__.<locals>.sender at 0x000001BCFC7C18C8>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <function Route.handle at 0x000001BCEE4FF6A8>
└ <fastapi.routing.APIRoute object at 0x000001BCFC7B8E80>
File "C:\Program Files\Python37\lib\site-packages\starlette\routing.py", line 227, in handle
await self.app(scope, receive, send)
│ │ │ │ └ <function ExceptionMiddleware.__call__.<locals>.sender at 0x000001BCFC7C18C8>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <function request_response.<locals>.app at 0x000001BCFC7C1A60>
└ <fastapi.routing.APIRoute object at 0x000001BCFC7B8E80>
File "C:\Program Files\Python37\lib\site-packages\starlette\routing.py", line 41, in app
response = await func(request)
│ └ <starlette.requests.Request object at 0x000001BCFC7D4588>
└ <function get_request_handler.<locals>.app at 0x000001BCFC7C19D8>
File "C:\Program Files\Python37\lib\site-packages\fastapi\routing.py", line 213, in app
is_coroutine=is_coroutine,
└ True
File "C:\Program Files\Python37\lib\site-packages\fastapi\routing.py", line 113, in serialize_response
exclude_none=exclude_none,
└ False
File "C:\Program Files\Python37\lib\site-packages\fastapi\routing.py", line 65, in _prepare_response_content
exclude_none=exclude_none,
└ False
File "pydantic\main.py", line 386, in pydantic.main.BaseModel.dict
File "pydantic\main.py", line 706, in _iter
File "pydantic\main.py", line 623, in pydantic.main.BaseModel._get_value
File "pydantic\main.py", line 623, in pydantic.main.BaseModel._get_value
File "pydantic\main.py", line 623, in pydantic.main.BaseModel._get_value
[Previous line repeated 722 more times]
File "pydantic\main.py", line 605, in pydantic.main.BaseModel._get_value
File "C:\Program Files\Python37\lib\abc.py", line 139, in __instancecheck__
return _abc_instancecheck(cls, instance)
│ │ └ 8
│ └ <class 'pydantic.main.BaseModel'>
└ <built-in function _abc_instancecheck>
RecursionError: maximum recursion depth exceeded in comparison```
这是一个简单的问题，已通过修改输出响应以匹配 pydantic 模型得到解决
错误：ASGI 应用程序异常
仅表示在尝试 test/run
之前尚未保存一个或多个 .py 文件
描述
我已经看到有关导致 RecursionError: maximum recursion depth exceeded in comparison 自引用 Pydantic 模型的类似问题，但据我所知，代码中没有包含自引用模型。我只是在使用 Pydantic 的 BaseModel class.
代码 运行 成功，直到下面 audit.py 中的函数尝试 return 模型的输出。
我已经包含了完整的回溯，因为我不确定从哪里开始这个错误。我有 运行 带有 PyCharm 而没有 IDE 的代码，它总是产生下面的回溯，但不会使应用程序崩溃，但 return 的 http 状态代码为 500到前端。
如有任何建议，我们将不胜感激。
按照建议，我也尝试 sys.setrecursionlimit(1500) 增加递归限制。
环境
- OS: Windows 10
- FastAPI 版本：0.61.1
- Pydantic 版本：1.6.1
- 独角兽版本：0.11.8
- Python版本：3.7.1
- Pycharm版本：2020.2
应用程序
main.py
import uvicorn
from fastapi import FastAPI
from starlette.middleware.cors import CORSMiddleware
from app.api.routes.router import api_router
from app.core.logging import init_logging
from app.core.config import settings
init_logging()
def get_app() -> FastAPI:
application = FastAPI(title=settings.APP_NAME, version=settings.APP_VERSION, debug=settings.DEBUG)
if settings.BACKEND_CORS_ORIGINS:
# middleware support for cors
application.add_middleware(
CORSMiddleware,
allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
application.include_router(api_router, prefix=settings.API_V1_STR)
return application
app = get_app()
if __name__ == "__main__":
uvicorn.run("main:app", host="127.0.0.1", port=80)
router.py
from fastapi import APIRouter
from app.api.routes import audit
api_router = APIRouter()
api_router.include_router(audit.router, tags=["audit"], prefix="/audit")
audit.py
import validators
from fastapi import APIRouter, HTTPException
from loguru import logger
from app.api.dependencies.audit import analyzer
from app.schemas.audit import AuditPayload, AuditResult
router = APIRouter()
@router.post("/", response_model=AuditResult, name="audit", status_code=200)
async def post_audit(payload: AuditPayload) -> AuditResult:
logger.info("Audit request received")
# validate URL
try:
logger.info("Validating URL")
validators.url(payload.url)
except HTTPException:
HTTPException(status_code=404, detail="Invalid URL.")
logger.exception("HTTPException - Invalid URL")
# generate output from route audit.py
logger.info("Running audit analysis. This could take up to 10 minutes. Maybe grab a coffee...")
analyzed_output = analyzer.analyze(url=payload.url,
brand=payload.brand,
twitter_screen_name=payload.twitter_screen_name,
facebook_page_name=payload.facebook_page_name,
instagram_screen_name=payload.instagram_screen_name,
youtube_user_name=payload.youtube_user_name,
ignore_robots=payload.ignore_robots,
ignore_sitemap=payload.ignore_sitemap,
google_analytics_view_id=payload.google_analytics_view_id)
output = AuditResult(**analyzed_output)
return output
audit_models.py
from pydantic import BaseModel
class AuditPayload(BaseModel):
url: str
brand: str
twitter_screen_name: str
facebook_page_name: str
instagram_screen_name: str
youtube_user_name: str
ignore_robots: bool
ignore_sitemap: bool
google_analytics_view_id: str
class AuditResult(BaseModel):
base_url: str
run_time: float
website_404: dict
website_302: dict
website_h1_tags: dict
website_duplicate_h1: dict
website_h2_tags: dict
website_page_duplications: dict
website_page_similarities: dict
website_page_desc_duplications: dict
website_page_title_duplications: dict
pages: list
pages_out_links_404: dict = None
pages_canonicals: dict
seo_phrases: dict
social: dict
google_analytics_report: dict
google_psi_desktop: dict
google_psi_mobile: dict
google_algo_updates: dict
google_sb: list
robots_txt: list
此行在日志中抛出错误： 2020-09-10 10:02:31.483 |错误 | uvicorn.protocols.http.h11_impl:run_asgi:391 - ASGI 应用程序异常
我认为这一点与理解为什么会发生此错误最相关：
File "pydantic\main.py", line 623, in pydantic.main.BaseModel._get_value
[Previous line repeated 722 more times]
完整追溯：
Traceback (most recent call last):
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\pydevconsole.py", line 483, in <module>
pydevconsole.start_client(host, port)
│ │ │ └ 50488
│ │ └ '127.0.0.1'
│ └ <function start_client at 0x000001BCEDC19D08>
└ <module 'pydevconsole' from 'C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-0\202.6948.78\pl...
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\pydevconsole.py", line 411, in start_client
process_exec_queue(interpreter)
│ └ <_pydev_bundle.pydev_ipython_console.InterpreterInterface object at 0x000001BCEDC1BF98>
└ <function process_exec_queue at 0x000001BCEDC19A60>
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\pydevconsole.py", line 258, in process_exec_queue
more = interpreter.add_exec(code_fragment)
│ │ └ <_pydev_bundle.pydev_console_types.CodeFragment object at 0x000001BCEDCFE748>
│ └ <function BaseCodeExecutor.add_exec at 0x000001BCECF38488>
└ <_pydev_bundle.pydev_ipython_console.InterpreterInterface object at 0x000001BCEDC1BF98>
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_bundle\pydev_code_executor.py", line 106, in add_exec
more = self.do_add_exec(code_fragment)
│ │ └ <_pydev_bundle.pydev_console_types.CodeFragment object at 0x000001BCEDCFE748>
│ └ <function InterpreterInterface.do_add_exec at 0x000001BCEDC15D90>
└ <_pydev_bundle.pydev_ipython_console.InterpreterInterface object at 0x000001BCEDC1BF98>
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_bundle\pydev_ipython_console.py", line 36, in do_add_exec
res = bool(self.interpreter.add_exec(code_fragment.text))
│ │ │ │ └ "runfile('E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py', wdir='E:/Users/<user>/Docume...
│ │ │ └ <_pydev_bundle.pydev_console_types.CodeFragment object at 0x000001BCEDCFE748>
│ │ └ <function _PyDevFrontEnd.add_exec at 0x000001BCEDC15A60>
│ └ <_pydev_bundle.pydev_ipython_console_011._PyDevFrontEnd object at 0x000001BCEDC350B8>
└ <_pydev_bundle.pydev_ipython_console.InterpreterInterface object at 0x000001BCEDC1BF98>
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_bundle\pydev_ipython_console_011.py", line 483, in add_exec
self.ipython.run_cell(line, store_history=True)
│ │ │ └ "runfile('E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py', wdir='E:/Users/<user>/Docume...
│ │ └ <function InteractiveShell.run_cell at 0x000001BCED5E7268>
│ └ <_pydev_bundle.pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x000001BCEDC350F0>
└ <_pydev_bundle.pydev_ipython_console_011._PyDevFrontEnd object at 0x000001BCEDC350B8>
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 2843, in run_cell
raw_cell, store_history, silent, shell_futures)
│ │ │ └ True
│ │ └ False
│ └ True
└ "runfile('E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py', wdir='E:/Users/<user>/Docume...
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 2869, in _run_cell
return runner(coro)
│ └ <generator object InteractiveShell.run_cell_async at 0x000001BCEDC49C78>
└ <function _pseudo_sync_runner at 0x000001BCED5D0C80>
File "C:\Program Files\Python37\lib\site-packages\IPython\core\async_helpers.py", line 67, in _pseudo_sync_runner
coro.send(None)
│ └ <method 'send' of 'generator' objects>
└ <generator object InteractiveShell.run_cell_async at 0x000001BCEDC49C78>
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 3044, in run_cell_async
interactivity=interactivity, compiler=compiler, result=result)
│ │ └ <ExecutionResult object at 1bcedcd3470, execution_count=2 error_before_exec=None error_in_exec=None info=<ExecutionInfo objec...
│ └ <IPython.core.compilerop.CachingCompiler object at 0x000001BCEDC356D8>
└ 'last_expr'
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 3215, in run_ast_nodes
if (yield from self.run_code(code, result)):
│ │ │ └ <ExecutionResult object at 1bcedcd3470, execution_count=2 error_before_exec=None error_in_exec=None info=<ExecutionInfo objec...
│ │ └ <code object <module> at 0x000001BCEDCDADB0, file "<ipython-input-2-086756a0f1dd>", line 1>
│ └ <function InteractiveShell.run_code at 0x000001BCED5E76A8>
└ <_pydev_bundle.pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x000001BCEDC350F0>
File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 3291, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
│ │ │ │ └ {'__name__': 'pydev_umd', '__doc__': 'Automatically created module for IPython interactive environment', '__package__': None,...
│ │ │ └ <_pydev_bundle.pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x000001BCEDC350F0>
│ │ └ <property object at 0x000001BCED5D8958>
│ └ <_pydev_bundle.pydev_ipython_console_011.PyDevTerminalInteractiveShell object at 0x000001BCEDC350F0>
└ <code object <module> at 0x000001BCEDCDADB0, file "<ipython-input-2-086756a0f1dd>", line 1>
File "<ipython-input-2-086756a0f1dd>", line 1, in <module>
runfile('E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py', wdir='E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app')
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_bundle\pydev_umd.py", line 197, in runfile
pydev_imports.execfile(filename, global_vars, local_vars) # execute the script
│ │ │ │ └ {'__name__': '__main__', '__doc__': "\nMain entry point into API for endpoints related to HawkSense's main functionality.\nto...
│ │ │ └ {'__name__': '__main__', '__doc__': "\nMain entry point into API for endpoints related to HawkSense's main functionality.\nto...
│ │ └ 'E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py'
│ └ <function execfile at 0x000001BCECC521E0>
└ <module '_pydev_bundle.pydev_imports' from 'C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-0\...
File "C:\Users\<user>\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-02.6948.78\plugins\python\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
│ │ │ └ {'__name__': '__main__', '__doc__': "\nMain entry point into API for endpoints related to HawkSense's main functionality.\nto...
│ │ └ {'__name__': '__main__', '__doc__': "\nMain entry point into API for endpoints related to HawkSense's main functionality.\nto...
│ └ 'E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app/main.py'
└ '#!/usr/bin/env python\n\n"""\nMain entry point into API for endpoints related to HawkSense\'s main functionality.\ntodo: htt...
File "E:/Users/<user>/Documents/GitHub/HawkSense/backend/app/app\main.py", line 47, in <module>
uvicorn.run("main:app", host="127.0.0.1", port=80) # for debug only
│ └ <function run at 0x000001BCEDE041E0>
└ <module 'uvicorn' from 'C:\Program Files\Python37\lib\site-packages\uvicorn\__init__.py'>
File "C:\Program Files\Python37\lib\site-packages\uvicorn\main.py", line 362, in run
server.run()
│ └ <function Server.run at 0x000001BCEDE4B510>
└ <uvicorn.main.Server object at 0x000001BCFC722198>
File "C:\Program Files\Python37\lib\site-packages\uvicorn\main.py", line 390, in run
loop.run_until_complete(self.serve(sockets=sockets))
│ │ │ │ └ None
│ │ │ └ <function Server.serve at 0x000001BCEDE4B598>
│ │ └ <uvicorn.main.Server object at 0x000001BCFC722198>
│ └ <function BaseEventLoop.run_until_complete at 0x000001BCED49FE18>
└ <_WindowsSelectorEventLoop running=True closed=False debug=False>
File "C:\Program Files\Python37\lib\asyncio\base_events.py", line 560, in run_until_complete
self.run_forever()
│ └ <function BaseEventLoop.run_forever at 0x000001BCED49FD90>
└ <_WindowsSelectorEventLoop running=True closed=False debug=False>
File "C:\Program Files\Python37\lib\asyncio\base_events.py", line 528, in run_forever
self._run_once()
│ └ <function BaseEventLoop._run_once at 0x000001BCED4A27B8>
└ <_WindowsSelectorEventLoop running=True closed=False debug=False>
File "C:\Program Files\Python37\lib\asyncio\base_events.py", line 1764, in _run_once
handle._run()
│ └ <function Handle._run at 0x000001BCED43AB70>
└ <Handle <TaskStepMethWrapper object at 0x000001BCFC7D4B00>()>
File "C:\Program Files\Python37\lib\asyncio\events.py", line 88, in _run
self._context.run(self._callback, *self._args)
│ │ │ │ │ └ <member '_args' of 'Handle' objects>
│ │ │ │ └ <Handle <TaskStepMethWrapper object at 0x000001BCFC7D4B00>()>
│ │ │ └ <member '_callback' of 'Handle' objects>
│ │ └ <Handle <TaskStepMethWrapper object at 0x000001BCFC7D4B00>()>
│ └ <member '_context' of 'Handle' objects>
└ <Handle <TaskStepMethWrapper object at 0x000001BCFC7D4B00>()>
> File "C:\Program Files\Python37\lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 388, in run_asgi
result = await app(self.scope, self.receive, self.send)
│ │ │ │ │ │ └ <function RequestResponseCycle.send at 0x000001BCFC757840>
│ │ │ │ │ └ <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>
│ │ │ │ └ <function RequestResponseCycle.receive at 0x000001BCFC7578C8>
│ │ │ └ <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>
└ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x000001BCFC722BA8>
File "C:\Program Files\Python37\lib\site-packages\uvicorn\middleware\proxy_headers.py", line 45, in __call__
return await self.app(scope, receive, send)
│ │ │ │ └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <fastapi.applications.FastAPI object at 0x000001BCFC722710>
└ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x000001BCFC722BA8>
File "C:\Program Files\Python37\lib\site-packages\fastapi\applications.py", line 149, in __call__
await super().__call__(scope, receive, send)
│ │ └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>>
│ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
└ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
File "C:\Program Files\Python37\lib\site-packages\starlette\applications.py", line 102, in __call__
await self.middleware_stack(scope, receive, send)
│ │ │ │ └ <bound method RequestResponseCycle.send of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4A90>>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <starlette.middleware.errors.ServerErrorMiddleware object at 0x000001BCFC7B8FD0>
└ <fastapi.applications.FastAPI object at 0x000001BCFC722710>
File "C:\Program Files\Python37\lib\site-packages\starlette\middleware\errors.py", line 181, in __call__
raise exc from None
File "C:\Program Files\Python37\lib\site-packages\starlette\middleware\errors.py", line 159, in __call__
await self.app(scope, receive, _send)
│ │ │ │ └ <function ServerErrorMiddleware.__call__.<locals>._send at 0x000001BCFC72AE18>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <starlette.middleware.cors.CORSMiddleware object at 0x000001BCFC7B8F60>
└ <starlette.middleware.errors.ServerErrorMiddleware object at 0x000001BCFC7B8FD0>
File "C:\Program Files\Python37\lib\site-packages\starlette\middleware\cors.py", line 84, in __call__
await self.simple_response(scope, receive, send, request_headers=headers)
│ │ │ │ │ └ Headers({'host': '127.0.0.1', 'connection': 'keep-alive', 'content-length': '295', 'accept': 'application/json', 'user-agent'...
│ │ │ │ └ <function ServerErrorMiddleware.__call__.<locals>._send at 0x000001BCFC72AE18>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <function CORSMiddleware.simple_response at 0x000001BCEE53DC80>
└ <starlette.middleware.cors.CORSMiddleware object at 0x000001BCFC7B8F60>
File "C:\Program Files\Python37\lib\site-packages\starlette\middleware\cors.py", line 140, in simple_response
await self.app(scope, receive, send)
│ │ │ │ └ functools.partial(<bound method CORSMiddleware.send of <starlette.middleware.cors.CORSMiddleware object at 0x000001BCFC7B8F60...
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <starlette.exceptions.ExceptionMiddleware object at 0x000001BCFC7B8E48>
└ <starlette.middleware.cors.CORSMiddleware object at 0x000001BCFC7B8F60>
File "C:\Program Files\Python37\lib\site-packages\starlette\exceptions.py", line 82, in __call__
raise exc from None
File "C:\Program Files\Python37\lib\site-packages\starlette\exceptions.py", line 71, in __call__
await self.app(scope, receive, sender)
│ │ │ │ └ <function ExceptionMiddleware.__call__.<locals>.sender at 0x000001BCFC7C18C8>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <fastapi.routing.APIRouter object at 0x000001BCFC7220F0>
└ <starlette.exceptions.ExceptionMiddleware object at 0x000001BCFC7B8E48>
File "C:\Program Files\Python37\lib\site-packages\starlette\routing.py", line 550, in __call__
await route.handle(scope, receive, send)
│ │ │ │ └ <function ExceptionMiddleware.__call__.<locals>.sender at 0x000001BCFC7C18C8>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <function Route.handle at 0x000001BCEE4FF6A8>
└ <fastapi.routing.APIRoute object at 0x000001BCFC7B8E80>
File "C:\Program Files\Python37\lib\site-packages\starlette\routing.py", line 227, in handle
await self.app(scope, receive, send)
│ │ │ │ └ <function ExceptionMiddleware.__call__.<locals>.sender at 0x000001BCFC7C18C8>
│ │ │ └ <bound method RequestResponseCycle.receive of <uvicorn.protocols.http.h11_impl.RequestResponseCycle object at 0x000001BCFC7D4...
│ │ └ {'type': 'http', 'asgi': {'version': '3.0', 'spec_version': '2.1'}, 'http_version': '1.1', 'server': ('127.0.0.1', 80), 'clie...
│ └ <function request_response.<locals>.app at 0x000001BCFC7C1A60>
└ <fastapi.routing.APIRoute object at 0x000001BCFC7B8E80>
File "C:\Program Files\Python37\lib\site-packages\starlette\routing.py", line 41, in app
response = await func(request)
│ └ <starlette.requests.Request object at 0x000001BCFC7D4588>
└ <function get_request_handler.<locals>.app at 0x000001BCFC7C19D8>
File "C:\Program Files\Python37\lib\site-packages\fastapi\routing.py", line 213, in app
is_coroutine=is_coroutine,
└ True
File "C:\Program Files\Python37\lib\site-packages\fastapi\routing.py", line 113, in serialize_response
exclude_none=exclude_none,
└ False
File "C:\Program Files\Python37\lib\site-packages\fastapi\routing.py", line 65, in _prepare_response_content
exclude_none=exclude_none,
└ False
File "pydantic\main.py", line 386, in pydantic.main.BaseModel.dict
File "pydantic\main.py", line 706, in _iter
File "pydantic\main.py", line 623, in pydantic.main.BaseModel._get_value
File "pydantic\main.py", line 623, in pydantic.main.BaseModel._get_value
File "pydantic\main.py", line 623, in pydantic.main.BaseModel._get_value
[Previous line repeated 722 more times]
File "pydantic\main.py", line 605, in pydantic.main.BaseModel._get_value
File "C:\Program Files\Python37\lib\abc.py", line 139, in __instancecheck__
return _abc_instancecheck(cls, instance)
│ │ └ 8
│ └ <class 'pydantic.main.BaseModel'>
└ <built-in function _abc_instancecheck>
RecursionError: maximum recursion depth exceeded in comparison```
这是一个简单的问题，已通过修改输出响应以匹配 pydantic 模型得到解决
错误：ASGI 应用程序异常
仅表示在尝试 test/run
之前尚未保存一个或多个 .py 文件