Warnings are not shown in the Notebook editor

Bug: Notebook Editor, Interactive Window, Editor cells

Warnings are not shown in the Notebook Editor.

Steps to cause the bug to occur

1. If I run the following code in a .py from terminal, I get the warning message, but if I run it inside a cell in the Notebook editor, nothing appears.

import warnings  
warnings.warn('Warning Message') 

Actual behavior

Expected behavior

Your Jupyter and/or Python environment

Please provide as much info as you readily know

• Jupyter server running: Local
• Extension version: 2020.5.80290
• VS Code version: 1.45.1
• Setting python.jediEnabled: false
• **Python version: Python 3.8.0
• OS: Windows | Mac | Linux (distro): Linux (Ubuntu)
• Virtual environment: conda | venv | virtualenv | N/A | … venv

Developer Tools Console Output

Microsoft Data Science for VS Code Engineering Team: @rchiodo, @IanMatthewHuff, @DavidKutu, @DonJayamanne, @greazer

[ashtou]

@IanMatthewHuff thanks. Yes, please do. Data-science packages often provide important warnings. For anyone else who might face the same problem, you’ll need to use warnings.simplefilter(action="default") in the notebooks for now.

[DavidRuhe]

You can automatically do this for every notebook or interactive window by adding the following to settings.json

    "python.dataScience.runStartupCommands": 
        ["import warnings", 
        "warnings.simplefilter(action='default')"
    ]