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Python Flask Basics Welcome to Flask First Steps

Chen Wang
Chen Wang
7,371 Points

how can I view the .py file in a browser?

I mean if I write the code locally, it seems I cannot drag it directly to a browser. If I do so, I can just see the scripts in browser.

2 Answers

Jose Soto
Jose Soto
23,407 Points

Python does not output to the browser. That is what Flask will help you do. Essentially, you need to output your python script via a Flask view/controller. You'll get more information on how to do that in later videos.

Change IP address in the script to your local IP which is

app.run( port=80, host='')

Open your browser and go to or localhost and you can see your 'Hello World!' now

If you change route to something like


you can access it via or localhost/mynewroute

If you are using XAMPP or any other program which uses port 80, you need to change the port number to something like 8000 in your script

app.run( port=8000, host='')

Now you can access your page in browser by going to localhost:8000 or