set FLASK_DEBUG=1 not working on Powershell

flask, powershell, python

Solution

The syntax for setting environment variables is different in PowerShell, use `$env:`.

> $env:FLASK_APP = "helloworld.py"
> $env:FLASK_DEBUG = "1"
> flask run

`set` is used for Windows CMD.

> set FLASK_DEBUG=1

`export` is used by most other shells, like Bash and Zsh, such as on Linux and MacOS.

$ export FLASK_DEBUG=1

Problem

I'm building a Flask application and my file "helloworld.py" is: ``` from flask import Flask app = Flask(__name__) @app.route('/home') def hello_world(): return 'Home!' @app.route('/about') def about_us(): return 'aboutus!' ``` My Flask code after activating venv: ``` set FLASK_DEBUG=1 flask run ``` Changes made to my "helloworld.py" file doesn't get automatically updated. I still have to restart it manually as I change anything in the code. There is no error thrown but the changes simply don't reflect in the browser. Why is the debug mode not working, can someone help me out?

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