Always rerun doesn't work with VSCode

Summary

The “Always re-run” button doesn’t seem to work when editing files with VSCode. It only appears the first time after I refresh localhost (and edit my file), which is normal. But, for any further source code edits I need to manually re-run the file (press R inside localhost). This works as intended while editing the file with other file editors (tested on Notepad++, Notepad).

Steps to reproduce

1. Create new basic main.py file:

import streamlit as st
st.title('My first app')

1. Start server: streamlit run main.py --server.port=80
2. Open main.py in VSCode and edit it
3. Click on Always re-run (the file re-runs and displays the edit)
4. Edit main.py in VSCode again (this time the file doesn’t re-runs)

Expected behavior:

The result in localhost should have updated based on the edited source code.

Actual behavior:

The localhost generated file doesn’t automatically re-run after editing the main.py file in VSCode.

Is this a regression?

This is my first time using streamlit.

Debug info

• Streamlit version: 0.52.2
• Python version: 3.7.4
• Using Conda 4.8.1, with pip 19.2.3
• OS version: Windows 10
• Browser version: Google Chrome 79.0.3945.117

Additional information

I followed this: https://docs.streamlit.io/getting_started.html#import-streamlit

[tconkling]

Thanks for the report, @cornelg7!

I can repro this on Windows 10/VSCode 1.4.1. Probably a watchdog issue? We’ll triage it and take a look soon.

[jrhone]

@cornelg7 @tconkling could you confirm that upgrading VSCode to 1.45 fixes the issue for you?