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I followed the installation of the xeus-cling (created an env, activated,installed xeus-cling there) and when I want to select the C++14 kernel in a jupyter notebook it only appears Python3. What am I doing wrong?

TylerH
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Isaac Domínguez Larrañaga
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    What instructions did you follow? How do you attempt to "select the C++14 kernel"? How does Python3 "appears"? Also please take some time to read about [how to ask good questions](http://stackoverflow.com/help/how-to-ask), as well as [this question checklist](https://codeblog.jonskeet.uk/2012/11/24/stack-overflow-question-checklist/). – Some programmer dude Jan 30 '20 at 13:23
  • Hi, I followed https://github.com/jupyter-xeus/xeus-cling guide for installation. When I create a jupyter notebook, it doesnt appear the c++14 option. Only Python3. – Isaac Domínguez Larrañaga Jan 30 '20 at 13:25
  • The easiest fix is probably to install Jupyter Notebook in the same environment. Then make sure you activate that environment before you start Jupyter. – darthbith Jan 31 '20 at 16:25
  • Yeah @darthbith, I was using default Jupyter! Thanks for your help. – Isaac Domínguez Larrañaga Feb 07 '20 at 19:34

3 Answers3

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I had the same problem. Its because jupyter-notebook is not installed in your environment. The jupyter server which is starting is the global one hence you don't see the c++14 option. The solution is:

  1. Create a new directory and git clone the repository.
  2. Run the conda env create -f environmental.yml command in cmd.
  3. Run the conda activate xeus-cling command.
  4. Run the jupyter notebook command.

You should now be able to see the c++14 and c++17 options. Step 2 created the xeus-cling environment and installs all the correct package versions including the correct jupyter notebook version.

sudo97
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Stochastic Quant
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Install notebook in your environment.

conda install xeus-cling notebook -c QuantStack -c conda-forge
Naman Jain
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You need register new kernels in jupyter:

jupyter kernelspec install PREFIX/share/jupyter/xcpp11 --sys-prefix
jupyter kernelspec install PREFIX/share/jupyter/xcpp14 --sys-prefix
jupyter kernelspec install PREFIX/share/jupyter/xcpp17 --sys-prefix
Филя Усков
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