問：Python/Docker - 運行 docker 容器時，沒有為 Django==4.0.2 找到匹配的發行版

Question

我有一個項目，我試圖在我的 Visual Studio 代碼編輯器中運行名為 Veganettest，但是，當我運行docker-compose up我收到一個錯誤，上面寫着ERROR: No matching distribution found for Django==4.0.2即使這樣分布確實存在。 I have tried various other solutions on here like installing the library using pip install Django pip could not find a version that satisfies the requirement django==2.2.1 , Tried to downgrade and upgrade the version of Django to different values ex. Django==3.1.3、Django==3.0 和 Django==4.0 錯誤：找不到滿足 tensorflow 要求的版本（來自版本：無）錯誤：沒有為 tensorflow 找到匹配的分布）但是當我嘗試這些解決方案時他們不工作。 該錯誤來自我的 requirements.txt 文件，特別是來自聲明Django==4.0.2作為要求的第一行。

這是我最初遇到的一些警告的完整錯誤：

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001B4E55BC430>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed')': /simple/django/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001B4E55DE070>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed')': /simple/django/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001B4E55DE220>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed')': /simple/django/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001B4E55DE3D0>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed')': /simple/django/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x000001B4E55DE580>: Failed to establish a new connection: [Errno 11002] getaddrinfo failed')': /simple/django/
ERROR: Could not find a version that satisfies the requirement Django==4.0.2 (from versions: none)
ERROR: No matching distribution found for Django==4.0.2

這里分別是我的 requirements.txt、Dockerfile、docker-compose.yml 和 manage.py 文件：

要求.txt：

Django==4.0.2
djangorestframework==3.12.2
mysqlclient==2.0.1
django-mysql==3.9
django-cors-headers==3.5.0
pika==1.1.0
pillow==9.0.0
matplotlib==3.5.0

Dockerfile：

FROM python:3.9
ENV PYTHONUNBUFFERED 1
WORKDIR /app
COPY requirements.txt /app/requirements.txt
RUN pip install -r requirements.txt
COPY . /app

docker-compose.yml：

version: '3.9'
services:
  backend:
    build: 
      context: .
      dockerfile: Dockerfile
    command: 'python manage.py runserver 0.0.0.0:8000'
    ports:
      - 8000:8000
    volumes: 
      - .:/app
    depends_on:
      - db

  db:
    image: mysql:5.7.22
    restart: always
    environment:
      MYSQL_DATABASE: veganettest
      MYSQL_USER: foodiehutts
      MYSQL_PASSWORD: bobaboyheheh21342345><L
      MYSQL_ROOT_PASSWORD: root
    volumes:
      - .dbdata:/var/lib/mysql
    ports:
      - 33065:3306

管理.py：

import os
import sys


def main():
    """Run administrative tasks."""
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'veganettest.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()  

為什么會發生此錯誤？ 我能做些什么來解決它？ 謝謝你。

Answer 1

I had a similar issue and upgrading pip worked for me ( RUN pip install --upgrade pip && pip install -r requirements.txt ). 不過，我沒有“NewConnectionError”。