Installed d:\python\lib\site-packages\selenium-3.141.0-py3.9.egg
Processing dependencies for selenium==3.141.0
Searching for urllib3
Reading https://pypi.org/simple/urllib3/ https://pypi.org/simple/urllib3/
Download error on https://pypi.org/simple/urllib3/ https://pypi.org/simple/urllib3/ : Tunnel connection failed: 504 Gateway Time-out -- Some packages may not be found!
Couldn't find index page for 'urllib3' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.org/simple/ https://pypi.org/simple/
error: The read operation timed out
安装的时候看一下命令行的报错信息，一般离线安装都需要好多依赖包，报错信息提示缺少什么你就下载什么安顺序安装就好了