Jupyter Notebook with python 3 not running

Question

I cannot open jupyter notebook with Python 3. I have Anaconda for Python 2 and Anaconda for Python 3 installed (both 64 bit for Windows). If I run jupyter notebook for Python 2 everything works fine but with Python 3 it does not work. I already reinstalled Anaconda 3 (4.2 Version = Python 3.5) but that did not help. I also tried out all the google results. I still get the following error when i run jupyter notebook from the anacoda prompt. Any help is highly appreciated.

(C:\Users\Myamoto\Anaconda3) C:\Users\Myamoto>jupyter notebook _cffi_ext.c AppData\Roaming\Python\Python35\site-packages\zmq\backend\cffi\__pycache__\_cffi_ext.c(209): fatal error C1083: Cannot open include file: 'sys/un.h': No such file or directory Traceback (most recent call last): File "C:\Users\Myamoto\Anaconda3\Scripts\jupyter-notebook-script.py", line 3, in <module> import notebook.notebookapp File "C:\Users\Myamoto\Anaconda3\lib\site-packages\notebook\notebookapp.py", line 31, in <module> from zmq.eventloop import ioloop File "C:\Users\Myamoto\AppData\Roaming\Python\Python35\site-packages\zmq\__init__.py", line 34, in <module> from zmq import backend File "C:\Users\Myamoto\AppData\Roaming\Python\Python35\site-packages\zmq\backend\__init__.py", line 40, in <module> reraise(*exc_info) File "C:\Users\Myamoto\AppData\Roaming\Python\Python35\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise raise value File "C:\Users\Myamoto\AppData\Roaming\Python\Python35\site-packages\zmq\backend\__init__.py", line 27, in <module> _ns = select_backend(first) File "C:\Users\Myamoto\AppData\Roaming\Python\Python35\site-packages\zmq\backend\select.py", line 26, in select_backend mod = __import__(name, fromlist=public_api) File "C:\Users\Myamoto\AppData\Roaming\Python\Python35\site-packages\zmq\backend\cython\__init__.py", line 6, in <module> from . import (constants, error, message, context, ImportError: cannot import name 'constants'

ming lin · Accepted Answer · 2017-11-02 05:04:26Z

10

 pip uninstall pyzmq

after did that

 pip install pyzmq.

Thanks to Muten_Roshi. this method works nice.

answered Nov 2, 2017 at 5:04

ming lin

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Adriaan · Accepted Answer · 2019-03-06 10:55:23Z

Problem is with pyzmq, but running:

pip uninstall pyzmq

may end up with error Cannot uninstall 'pyzmq'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

If you're using Anaconda, such chain of commands may help (it actually fixed my problem):

conda uninstall pyzmq conda install pyzmq conda install jupyter

Adriaan · Accepted Answer · 2019-03-06 10:57:16Z

I faced the similar problem with spyder. I uninstalled all the packages that were creating issues and I uninstalled spyder as well.

Conda remove packages conda install packages

it started working again.

Muten_Roshi · Accepted Answer · 2017-06-29 12:29:37Z

I found a solution which worked for me. reinstall pyzmq in python3

If any of you guys got the same issue I hope that helps to solve it.

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