Load environment variables from .env file and global variables

[DonJayamanne]

Refs: #10359

• anyOS @IanMatthewHuff
• anyOS @rchiodo

Complexity: 3

Authors: @DonJayamanne

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Requirements

• Install prerelease jupyter extension into VS Code Insiders (desktop)
• Have a python environment that you can run jupyter from. (https://jupyter.org/install)
• Be familiar with jupyter notebooks
• Use Python 3.6 or later (please ensure you aren't using Python 2, use python --version to check the version)

Test loading variables from .env file

1. Open a folder in VS Code
2. Add a file named .env
3. Add an environment variable to the file
4. Create an ipynb file in the root directory
5. Run a cell in the ipynb file to print the value of the above env variable

import os
print(os.getenv(<env variable>))

7. Verify the right value is printed
8. Updated the value in the .env file
9. Restart the kernel and verify the new value is printed.

Test loading variables from global env variables

1. Exit VS Code completely
2. Create a global environment variable (on windows use env varaibles editor and unix update ~/.bashrc or the like)
3. Open a folder in VS Code
4. Create an ipynb file in the root directory
5. Run a cell in the ipynb file to print the value of the above env variable

import os
print(os.getenv(<env variable>))

7. Verify the right value is printed
8. Updated the environment variable
9. Exit vscode completely and reload VS Code
10. verify the new value is printed when running a cell again

[IanMatthewHuff]

Looks good. All the scenarios work for me. I think Rich is on Windows, which is good since I'm pretty sure at least all of the .env file stuff already worked for me on Mac.

[rchiodo]

I'm having trouble with ZMQ disabled. I can't run the IW at the moment.

[rchiodo]

I'm blocked on testing this because non ZMQ doesn't work for me.

Something submitted on this day broke non ZMQ for me:
https://dev.azure.com/monacotools/Monaco/_traceability/runview/changes?currentRunId=178730

[rchiodo]

Entered #10940

[rchiodo]

Works now after the ZMQ fix

[jtele2]

I am trying to get this to work. Does the file have to be the .ipynb extenstion? Does it have to be in the root folder?

I'm using the Python Interactive with regular .py files and the workflow proposed by @DonJayamanne is not working - although it is exactly what I am looking to do.

[DonJayamanne]

@jtele2
please file a separate issue with the results and steps required to repro the issue