安装scrapy,遇到WARNING: The script automat-visualize is installe

安装scrapy,遇到WARNING: The script automat-visualize is installe
  Running setup.py install for pycparser ... done
  Running setup.py install for PyDispatcher ... done
  WARNING: The script automat-visualize is installed in '/Library/Frameworks/Python.framework/Versions/3.7/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
  Running setup.py install for Twisted ... done
  WARNING: The script scrapy is installed in '/Library/Frameworks/Python.framework/Versions/3.7/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.

我的运行环境是Mac 然后:

scrapy startproject douban
-bash: scrapy: command not found

请问我的问题出现在哪里以及如何解决?

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