Python包安装故障求助：安装cowsay时遭遇连接重置错误

你遇到的是pip连接PyPI官方源时被远程主机强制关闭连接的错误，错误日志如下：

Obtaining dependency information for cowsay from https://files.pythonhosted.org/packages/f1/13/63c0a02c44024ee16f664e0b36eefeb22d54e93531630bd99e237986f534/cowsay-6.1-py3-none-any.whl.metadata
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))': /packages/f1/13/63c0a02c44024ee16f664e0b36eefeb22d54e93531630bd99e237986f534/cowsay-6.1-py3-none-any.whl.metadata
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))': /packages/f1/13/63c0a02c44024ee16f664e0b36eefeb22d54e93531630bd99e237986f534/cowsay-6.1-py3-none-any.whl.metadata
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))': /packages/f1/13/63c0a02c44024ee16f664e0b36eefeb22d54e93531630bd99e237986f534/cowsay-6.1-py3-none-any.whl.metadata
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))': /packages/f1/13/63c0a02c44024ee16f664e0b36eefeb22d54e93531630bd99e237986f534/cowsay-6.1-py3-none-any.whl.metadata
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))': /packages/f1/13/63c0a02c44024ee16f664e0b36eefeb22d54e93531630bd99e237986f534/cowsay-6.1-py3-none-any.whl.metadata
ERROR: Could not install packages due to an OSError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Max retries exceeded with url: /packages/f1/13/63c0a02c44024ee16f664e0b36eefeb22d54e93531630bd99e237986f534/cowsay-6.1-py3-none-any.whl.metadata (Caused by ProtocolError('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None)))

以下是可行的解决方法：

• 切换国内PyPI镜像源：国内访问官方源稳定性差，使用国内镜像能快速解决问题，执行命令：

  pip install cowsay -i https://pypi.tuna.tsinghua.edu.cn/simple
  

  也可以配置永久使用镜像源，避免每次输入：

  pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
  

• 检查网络与安全软件：重启路由器恢复网络连接；暂时关闭防火墙、杀毒软件或代理工具，这些程序可能拦截了pip的网络请求。

• 手动下载包安装：直接下载对应版本的cowsay包到本地，再执行本地安装：

  1. 下载cowsay-6.1-py3-none-any.whl文件
  2. 执行本地安装命令：

  pip install /path/to/cowsay-6.1-py3-none-any.whl
  

  （将/path/to/替换为实际文件路径）

• 更新pip版本：旧版pip可能存在网络兼容问题，先升级pip再尝试安装：

  pip install --upgrade pip
  

内容的提问来源于stack exchange，提问作者maryam