Summary[问题简述（一句话）]
Intel MacOS平台报错 No module named 'typer'

Env & To Reproduce[复现与环境]

% python3.7 -m pip  install torch torchvision torchaudio 
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: torch in /opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages (1.9.0)
Requirement already satisfied: torchvision in /opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages (0.10.0)
Requirement already satisfied: torchaudio in /opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages (0.9.0)
Requirement already satisfied: typing-extensions in /opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages (from torch) (4.3.0)
Requirement already satisfied: pillow>=5.3.0 in /opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages (from torchvision) (9.2.0)
Requirement already satisfied: numpy in /Users/migriane/Library/Python/3.7/lib/python/site-packages (from torchvision) (1.19.4)
migriane@MigrainedeMBP MockingBird-main % python3.7 web.py
Traceback (most recent call last):
  File "web.py", line 3, in <module>
    import typer
ModuleNotFoundError: No module named 'typer'