我一直被这个问题困扰着。我在一个UNIX RHEL8服务器上工作，它不允许访问Internet。
由于typing_extensions，我能够安装的所有必需的包和模块都期望这个pyPDF2模块

• Python语言3.6.8
• 已安装Pip 9.0.3，但由于无法访问互联网而无法使用
• PyPDF2 2.10.0尝试使用python setup.py build && python setup.py install安装

Installed /usr/local/lib/python3.6/site-packages/PyPDF2-2.10.0-py3.6.egg
Processing dependencies for PyPDF2==2.10.0
Searching for typing_extensions
Reading https://pypi.org/simple/typing_extensions/
Download error on https://pypi.org/simple/typing_extensions/: [Errno -2] Name or service not known -- Some packages may not be found!
Reading https://pypi.org/simple/typing-extensions/
Download error on https://pypi.org/simple/typing-extensions/: [Errno -2] Name or service not known -- Some packages may not be found!
Couldnt find index page for 'typing_extensions' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.org/simple/
Download error on https://pypi.org/simple/: [Errno -2] Name or service not known -- Some packages may not be found!
No local packages or working download links found for typing_extensions

pip install方法无法使用，因为没有internet访问
请帮帮我。谢谢