ipython server can't launch: No module named notebook.notebookapp
问题 I've been trying to setup an ipython server following several tutorials (since none was exactly my case). A couple days ago, I did manage to get it to the point where it was launching but then was not able to access it via url. Today it's not launching anymore and I can't find much about this specific error I get: Traceback (most recent call last): File "/usr/local/bin/ipython", line 9, in <module> load_entry_point('ipython==4.0.0-dev', 'console_scripts', 'ipython')() File "/usr/local/lib