Microsoft MVP성태의 닷넷 이야기
오류 유형: 851. 파이썬 ModuleNotFoundError: No module named '_cffi_backend' [링크 복사], [링크+제목 복사]
조회: 3995
글쓴 사람
정성태 (techsharer at outlook.com)
홈페이지
첨부 파일
 

파이썬 ModuleNotFoundError: No module named '_cffi_backend'

pymysql을 새롭게 설치해 예제 코드를 실행했더니 이런 오류가 발생하는군요. ^^

Traceback (most recent call last):
  File "/home/testusr/.local/lib/python3.6/site-packages/uvicorn/protocols/http/h11_impl.py", line 373, in run_asgi
    result = await app(self.scope, self.receive, self.send)
  File "/home/testusr/.local/lib/python3.6/site-packages/uvicorn/middleware/proxy_headers.py", line 75, in __call__
    return await self.app(scope, receive, send)
  File "/home/testusr/.local/lib/python3.6/site-packages/fastapi/applications.py", line 269, in __call__
    await super().__call__(scope, receive, send)
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/applications.py", line 124, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/middleware/errors.py", line 184, in __call__
    raise exc
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/middleware/errors.py", line 162, in __call__
    await self.app(scope, receive, _send)
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/middleware/base.py", line 68, in __call__
    response = await self.dispatch_func(request, call_next)
  File "/mnt/d/workshop2/python-agent/jennifer/wrap/middleware_fastapi.py", line 121, in dispatch
    raise err
  File "/mnt/d/workshop2/python-agent/jennifer/wrap/middleware_fastapi.py", line 97, in dispatch
    response = await call_next(request)
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/middleware/base.py", line 46, in call_next
    raise app_exc
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/middleware/base.py", line 36, in coro
    await self.app(scope, request.receive, send_stream.send)
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/exceptions.py", line 93, in __call__
    raise exc
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/exceptions.py", line 82, in __call__
    await self.app(scope, receive, sender)
  File "/home/testusr/.local/lib/python3.6/site-packages/fastapi/middleware/asyncexitstack.py", line 21, in __call__
    raise e
  File "/home/testusr/.local/lib/python3.6/site-packages/fastapi/middleware/asyncexitstack.py", line 18, in __call__
    await self.app(scope, receive, send)
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/routing.py", line 670, in __call__
    await route.handle(scope, receive, send)
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/routing.py", line 266, in handle
    await self.app(scope, receive, send)
  File "/home/testusr/.local/lib/python3.6/site-packages/starlette/routing.py", line 65, in app
    response = await func(request)
  File "/home/testusr/.local/lib/python3.6/site-packages/fastapi/routing.py", line 232, in app
    dependant=dependant, values=values, is_coroutine=is_coroutine
  File "/home/testusr/.local/lib/python3.6/site-packages/fastapi/routing.py", line 160, in run_endpoint_function
    return await dependant.call(**values)
  File "./main.py", line 274, in mysql_test
    text3 = test_pymysql_1()
  File "./main.py", line 512, in test_pymysql_1
    con = pymysql.connect(host=mysql_ip, user="...", password="...", database="...", charset='utf8')
  File "/mnt/d/testapp/test.py", line 354, in handler
    raise e
  File "/mnt/d/testapp/test.py", line 344, in handler
    origin_connection = connect(*args, **kwargs)
  File "/home/testusr/.local/lib/python3.6/site-packages/pymysql/connections.py", line 353, in __init__
    self.connect()
  File "/home/testusr/.local/lib/python3.6/site-packages/pymysql/connections.py", line 633, in connect
    self._request_authentication()
  File "/home/testusr/.local/lib/python3.6/site-packages/pymysql/connections.py", line 921, in _request_authentication
    auth_packet = self._process_auth(plugin_name, auth_packet)
  File "/home/testusr/.local/lib/python3.6/site-packages/pymysql/connections.py", line 957, in _process_auth
    return _auth.caching_sha2_password_auth(self, auth_packet)
  File "/home/testusr/.local/lib/python3.6/site-packages/pymysql/_auth.py", line 265, in caching_sha2_password_auth
    data = sha2_rsa_encrypt(conn.password, conn.salt, conn.server_public_key)
  File "/home/testusr/.local/lib/python3.6/site-packages/pymysql/_auth.py", line 147, in sha2_rsa_encrypt
    rsa_key = serialization.load_pem_public_key(public_key, default_backend())
  File "/usr/lib/python3/dist-packages/cryptography/hazmat/backends/__init__.py", line 15, in default_backend
    from cryptography.hazmat.backends.openssl.backend import backend
  File "/usr/lib/python3/dist-packages/cryptography/hazmat/backends/openssl/__init__.py", line 7, in <module>
    from cryptography.hazmat.backends.openssl.backend import backend
  File "/usr/lib/python3/dist-packages/cryptography/hazmat/backends/openssl/backend.py", line 16, in <module>
    from cryptography import utils, x509
  File "/usr/lib/python3/dist-packages/cryptography/x509/__init__.py", line 8, in <module>
    from cryptography.x509.base import (
  File "/usr/lib/python3/dist-packages/cryptography/x509/base.py", line 18, in <module>
    from cryptography.x509.extensions import Extension, ExtensionType
  File "/usr/lib/python3/dist-packages/cryptography/x509/extensions.py", line 20, in <module>
    from cryptography.hazmat.primitives import constant_time, serialization
  File "/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/constant_time.py", line 11, in <module>
    from cryptography.hazmat.bindings._constant_time import lib
ModuleNotFoundError: No module named '_cffi_backend'

이름이 살짝 다른 cffi 모듈을 설치하시면 됩니다. ^^

python3 -m pip install cffi




[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]







[최초 등록일: ]
[최종 수정일: 3/9/2023]

Creative Commons License
이 저작물은 크리에이티브 커먼즈 코리아 저작자표시-비영리-변경금지 2.0 대한민국 라이센스에 따라 이용하실 수 있습니다.
by SeongTae Jeong, mailto:techsharer at outlook.com

비밀번호

댓글 작성자
 




1  2  3  4  5  6  7  8  9  10  11  [12]  13  14  15  ...
NoWriterDateCnt.TitleFile(s)
13319정성태4/12/20234155개발 환경 구성: 674. WSL 2 환경에서 GNU Octave 설치
13318정성태4/11/20233972개발 환경 구성: 673. JetBrains IDE에서 "Squash Commits..." 메뉴가 비활성화된 경우
13317정성태4/11/20234144오류 유형: 855. WSL 2 Ubuntu 20.04 - error: cannot communicate with server: Post http://localhost/v2/snaps/...
13316정성태4/10/20233458오류 유형: 854. docker-compose 시 "json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)" 오류 발생
13315정성태4/10/20233653Windows: 245. Win32 - 시간 만료를 갖는 컨텍스트 메뉴와 윈도우 메시지의 영역별 정의파일 다운로드1
13314정성태4/9/20233727개발 환경 구성: 672. DosBox를 이용한 Turbo C, Windows 3.1 설치
13313정성태4/9/20233820개발 환경 구성: 671. Hyper-V VM에 Turbo C 2.0 설치 [2]
13312정성태4/8/20233804Windows: 244. Win32 - 시간 만료를 갖는 MessageBox 대화창 구현 (개선된 버전)파일 다운로드1
13311정성태4/7/20234291C/C++: 163. Visual Studio 2022 - DirectShow 예제 컴파일(WAV Dest)
13310정성태4/6/20233876C/C++: 162. Visual Studio - /NODEFAULTLIB 옵션 설정 후 수동으로 추가해야 할 library
13309정성태4/5/20234031.NET Framework: 2107. .NET 6+ FileStream의 구조 변화
13308정성태4/4/20233920스크립트: 47. 파이썬의 time.time() 실숫값을 GoLang / C#에서 사용하는 방법
13307정성태4/4/20233715.NET Framework: 2106. C# - .NET Core/5+ 환경의 Windows Forms 응용 프로그램에서 HINSTANCE 구하는 방법
13306정성태4/3/20233562Windows: 243. Win32 - 윈도우(cbWndExtra) 및 윈도우 클래스(cbClsExtra) 저장소 사용 방법
13305정성태4/1/20233893Windows: 242. Win32 - 시간 만료를 갖는 MessageBox 대화창 구현 (쉬운 버전)파일 다운로드1
13304정성태3/31/20234245VS.NET IDE: 181. Visual Studio - C/C++ 프로젝트에 application manifest 적용하는 방법
13303정성태3/30/20233536Windows: 241. 환경 변수 %PATH%에 DLL을 찾는 규칙
13302정성태3/30/20234159Windows: 240. RDP 환경에서 바뀌는 %TEMP% 디렉터리 경로
13301정성태3/29/20234308Windows: 239. C/C++ - Windows 10 Version 1607부터 지원하는 /DEPENDENTLOADFLAG 옵션파일 다운로드1
13300정성태3/28/20233946Windows: 238. Win32 - Modal UI 창에 올바른 Owner(HWND)를 설정해야 하는 이유
13299정성태3/27/20233731Windows: 237. Win32 - 모든 메시지 루프를 탈출하는 WM_QUIT 메시지
13298정성태3/27/20233673Windows: 236. Win32 - MessageBeep 소리가 안 들린다면?
13297정성태3/26/20234342Windows: 235. Win32 - Code Modal과 UI Modal
13296정성태3/25/20233689Windows: 234. IsDialogMessage와 협업하는 WM_GETDLGCODE Win32 메시지 [1]파일 다운로드1
13295정성태3/24/20233942Windows: 233. Win32 - modeless 대화창을 modal처럼 동작하게 만드는 방법파일 다운로드1
13294정성태3/22/20234120.NET Framework: 2105. LargeAddressAware 옵션이 적용된 닷넷 32비트 프로세스의 가용 메모리 - 두 번째
1  2  3  4  5  6  7  8  9  10  11  [12]  13  14  15  ...