输入cmd
 
==*====查看====python====安装位置==  
==where python==
 
==*查看已安装库==  
==pip list 或者pip freeze==
 
==*查看可以更新的第三方库==  
==pip list --outdated 这一步操作时间比较久==
 
==*更新库操作==  
==pip install --upgrade selenium (selenium为库名)==
 
==*卸载库操作==  
==pip uninstall selenium (selenium为库名)==
      

*升级pip  
C:\Users\Administrator\AppData\Local\Programs\Python\Python310\python.exe -m pip install --upgrade pip
 
*安装第三方库  
C:\Users\Administrator\>pip install pandas
 
*查看pydoc  
python -m pydoc