[Python] ERROR: pip's dependency resolver does not currently take into account all the packages that are installed.

 

ERROR: pip's dependency resolver does not currently take into account
all the packages that are installed
This behaviour is the source of the following dependency conflicts.
requests 2.23.0 requires urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1, 
but you have urllib3 1.26.12 which is incompatible.
Successfully installed async-generator-1.10 exceptiongroup-1.0.0rc9 h11-0.14.0 
outcome-1.2.0 selenium-4.5.0 sniffio-1.3.0 trio-0.22.0 trio-websocket-0.9.2 
urllib3-1.26.12 wsproto-1.2.0

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed.

pip로 라이브러리를 설치할 때 이런 에러가 종종 발생한다.

 

WARNING: The following packages were previously imported in this runtime:
  [urllib3]
You must restart the runtime in order to use newly installed versions.

이미 존재하는 소프트웨어 패키지와 연결된 프로그램 라이브러리이지만 버전 간 의존 관계가 일치하지 않는다는 말이다.
selenium을 설치하려 했으나 requests가 urllib3과 일치하지 않는다는 메세지를 받았다.

 

requests 2.23.0 requires urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1, 
but you have urllib3 1.26.12 which is incompatible.

requests 모듈이 요청한 2.23.0에는 urllib3가 필요한데 나한테 설치된 모듈은 호환되지 않는 urlib3 1.26.12를 가지고 있다.

---

 

해결방법 

python 설치 패키지의 의존 관계 오류 해제

위 글을 참고하여 설치된 패키지 목록을 뽑아 urlib 패키지에 대한 버전과 의존성을 재확인했다.

 

설치되어있는 패키지 목록 확인 

!pip check

urllib3 과 requests 패키지를 모두 업데이트

!pip install -U urllib3 

Looking in indexes: https://pypi.org/simple, https://us-python.pkg.dev/colab-wheels/public/simple/
Requirement already satisfied: urllib3 in /usr/local/lib/python3.7/dist-packages (1.26.12)

 

!pip install -U requests

Successfully installed requests-2.28.1
WARNING: The following packages were previously imported in this runtime:
  [requests]
You must restart the runtime in order to use newly installed versions.

 

업데이트 해준 다음 CoLab 의 경우 런타임 재시작하고 다시 import 하면 잘 실행된다 !