Fatal Error when starting jupyter notebook

问题

Issue: I get fatal error when I run jupyter notebook in cmd.exe as administratortor

in: python -m pip install jupyter
out: success
in: jupyter notebook
out: Fatal error in launcher: Unable to create process using '"'

Before you down vote please note that I've tried the following, but I get same fatal error when I try to launch jupyter notebook from cmd

uninstalled jupyter and installed anadonda (https://repo.continuum.io/archive/Anaconda3-5.0.1-Windows-x86_64.exe)
tried answer listed here but does not resolve the issue (Fatal error in launcher: Unable to create process using ""C:\Program Files (x86)\Python33\python.exe" "C:\Program Files (x86)\Python33\pip.exe"")
ran pip3 install --upgrade pip and ran pip3 install jupyter
ran jupyter notebook --help and I get same error

Environment

Windows 10 Pro 64-bit version 1709 build 16299.125
Python 3.6.4 (see sys paths in screen shot below)

screen shot of error https://www.dropbox.com/s/ai0ualjfj87uaaq/python_issue_20180127.png?dl=0

docs used:

https://jupyter.readthedocs.io/en/latest/install.html
https://jupyter.readthedocs.io/en/latest/running.html#running
http://jupyter.readthedocs.io/en/latest/install.html#alternative-for-experienced-python-users-installing-jupyter-with-pip

Thanks in advance!!

回答1:

I believe you need to open Jupyter notebooks by typing jupyter notebook in the anaconda prompt, not the regular windows command prompt.

回答2:

For Windows users that have anaconda installed, try on Windows CMD (better if you run it as admin):

(Assuming your environment is named "root")

activate root
jupyter notebook

Hope that helps

回答3:

In my case, There was one redundant path of python3 added in the environment variable already and I was adding again. I just removed that path and run jupyter notebook through command prompt and it worked perfectly.

回答4:

These command in cmd works:

activate root
jupyter notebook

The second command to open jupyter notebook is : jupyter-notebook-script.py

I basically try to open notebooks with jupyter lab so what I have done is the following:

1.Right-click on any notebook select "open with" then select "choose another app"
1. Now select "look for another app in pc"
2. Go to the directory where your Anaconda Scripts are present. For me it's C:\ProgramData\Anaconda3\Scripts
3. Select "jupyter-notebook.exe" or "jupyter-lab.exe"

Now every notebook will open automatically just by hitting enter and no need to type the command again and again

回答5:

I know this sounds strange ... But I ran:

python -m pip install jupyter

I did this inside my Anaconda (which I shouldn't have to do) and it installed jupyter... fixed the issue for me

回答6:

For those ones who do not have anaconda

python -m jupyter notebook

回答7:

I was using the Python37 installation from the Microsoft store, when I suddenly got the 'Fatal error in launcher: Unable to create process' error while trying to start the jupyter notebook. I actually tried every answer here, but with no succees.

The solution was to completely uninstall/delete everything Python/Jupyter related from AppData as well as the leftovers from my preceeding Anaconda installation and then go for a clean install from python.org.

I guess this is something we all have to do from time to time.

回答8:

Check in to your Environment Variable Paths. If you had installed both Python(Python 2.x.x) or Python3(Python 3.x.x) you will have a problem running Scripts file of python, since you had duplicated install. Uninstall the redundant one.

If you had tried to fix it multiple times and nothing works, try re-install your Python. This save lives every time.

来源：https://stackoverflow.com/questions/48480173/fatal-error-when-starting-jupyter-notebook

标签

python

windows

jupyter-notebook