每次我运行“jupyter notebook”时，为什么我总是在 mac os 上得到这个？

Question

Everytime i ran "jupyter notebook" on my mac os, why always got this error?

case:

1. i have python2.x and i installed python3.7 (so, i have two commands here)
2. i installed jupyter with pip
3. when i put jupyter notebook command, i always got these error

Error:

Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/bin/jupyter-notebook", line 11, in <module>
  sys.exit(main())
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/jupyter_core/application.py", line 266, in launch_instance
  return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/traitlets/config/application.py", line 658, in launch_instance
  app.start()
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/notebook/notebookapp.py", line 1697, in start
  browser = webbrowser.get(self.browser or None)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/webbrowser.py", line 42, in get
  register_standard_browsers()
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/webbrowser.py", line 531, in register_standard_browsers
  raw_result = subprocess.check_output(cmd, stderr=subprocess.DEVNULL)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 376, in check_output
  **kwargs).stdout
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 453, in run
  with Popen(*popenargs, **kwargs) as process:
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 756, in __init__
  restore_signals, start_new_session)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 1499, in _execute_child
  raise child_exception_type(errno_num, err_msg, err_filename)
NotADirectoryError: [Errno 20] Not a directory: 'xdg-settings'

Answer 1

I got the same NotADirectoryError: [Errno 20] . In your case, the file it is pointing to is 'xdg-settings' .

It seems that the file 'xdg-settings' might be a shortcut and the actual file can't be found. What you can do is simply delete that file (ONLY if it is a shortcut) . Then restart jupyter notebook and it should work fine.

Answer 2

For anyone finding this error, here's how you solve it ( credit to @rrios-eq on Github ):

It's a if/else logic bug in webbrowser.py ; a simple fix is to edit /usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7/webbrowser.py (or wherever Jupyter is pointing you to) and then look for xdg-settings in the code.

Several lines above (15 in my case), you will have if sys.platform[:3] == "win": if you change it to elif sys.platform[:3] == "win": then the Darwin/Windows/Linux will work properly. I'm running python3.7 from Homebrew using macOS 10.14.2.

Answer 3

From warp-x : If you don't mind opening your browser manually, you can pass --no-browser when starting the notebook: $ jupyter notebook --no-browser . You can then open your browser, navigate to the notebook in a browser (normally localhost:8888 ) manually and do you your work.

Answer 4

找到文件/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/webbrowser.py然后是函数register_standard_browsers然后查找if sys.platform[:3] == "win":并通过elif sys.platform[:3] == "win":更改它并保存文件，它应该可以工作。