pip install pyperclip 安装失败，问题定位：Python模块无法越过企业防火墙直接使用

  Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connec tion broken by 'ProxyError('Cannot connect to proxy.', OSError('Tunnel connectio n failed: 407 authenticationrequired',

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