How to set env variable in Jupyter notebook

Question

I ve a problem that Jupyter can t see env variable in bashrc file  is there a way to load these variables in jupyter or add custome variable to it

User · Answer

If you re using Python  you can define your environment variables in a  env file and load them from within a Jupyter notebook using python-dotenv   Install python-dotenv   pip install python-dotenv   Load the  env file in a Jupyter notebook    load ext dotenv  dotenv

User · Answer

If you need the variable set before you re starting the notebook  the only solution which worked for me was env VARIABLE  VARIABLE jupyter notebook with export VARIABLE value in  bashrc    In my case tensorflow needs the exported variable for successful importing it in a notebook

User · Answer

If you are using systemd I just found out that you seem to have to add them to the systemd unit file  This on Ubuntu 16  Putting them into the  profile and  bashrc  even the  etc profile  resulted in the ENV Vars not being available in the juypter notebooks   I had to edit    lib systemd system jupyer-notebook service   and put in the variable i wanted to read in the unit file like   Environment MYOWN VAR theVar   and only then could I read it from within juypter notebook

User · Answer

A related  short-term  solution is to store your environment variables in a single file  with a predictable format  that can be sourced when starting a terminal and or read into the notebook  For example  I have a file   env  that has my environment variable definitions in the format VARIABLE NAME VARIABLE VALUE  no blank lines or extra spaces   You can source this file in the  bashrc or  bash profile files when beginning a new terminal session and you can read this into a notebook with something like   import os env vars    cat    script  env for var in env vars      key  value   var split          os environ key    value   I used a relative path to show that this  env file can live anywhere and be referenced relative to the directory containing the notebook file  This also has the advantage of not displaying the variable values within your code anywhere

User · Answer

A gotcha I ran into  The following two commands are equivalent  Note the first cannot use quotes  Somewhat counterintuitively  quoting the string when using  env VAR     will result in the quotes being included as part of the variable s value  which is probably not what you want     env MYPATH C  Folder Name file txt   and  import os os environ  MYPATH      C  Folder Name file txt

User · Answer

To set an env variable in a jupyter notebook  just use a   magic commands  either  env or  set env  e g    env MY VAR MY VALUE or  env MY VAR MY VALUE    Use  env by itself to print out current environmental variables    See  http   ipython readthedocs io en stable interactive magics html

User · Answer

You can setup environment variables in your code as follows   import sys os os path sys path append os path expanduser    code eol hsrl python    os environ  HSRL INSTRUMENT    gvhsrl  os environ  HSRL CONFIG   os path expanduser    hsrl config     This if of course a temporary fix  to get a permanent one  you probably need to export the variables into your   profile  more information can be found here

User · Answer

You can also set the variables in your kernel json file   My solution is useful if you need the same environment variables every time you start a jupyter kernel  especially if you have multiple sets of environment variables for different tasks   To create a new ipython kernel with your environment variables  do the following    Read the documentation at https   jupyter-client readthedocs io en stable kernels html kernel-specs Run jupyter kernelspec list to see a list with installed kernels and where the files are stored  Copy the directory that contains the kernel json  e g  named python2  to a new directory  e g  python2 myENV   Change the display name in the new kernel json file  Add a env dictionary defining the environment variables    Your kernel json could look like this  I did not modify anything from the installed kernel json except display name and env        display name    Python 2 with environment     language    python     argv         usr bin python2      -m      ipykernel launcher      -f       connection file         env     LD LIBRARY PATH          Use cases and advantages of this approach   In my use-case  I wanted to set the variable LD LIBRARY PATH which effects how compiled modules  e g  written in C  are loaded  Setting this variable using  set env did not work  I can have multiple python kernels with different environments  To change the environment  I only have to switch  restart the kernel  but I do not have to restart the jupyter instance  useful  if I do not want to loose the variables in another notebook   See -however - https   github com jupyter notebook issues 2647

[python] How to set env variable in Jupyter notebook

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