Question

Accessing debugger for flask @127.0.0.1:5000

Hello! So I have gone too long without having the debugger enabled when I am developing on my Ubuntu web server running Python with Flask. I got the debugger to run at ’ 127.0.0.1:5000 ’ after running the command ’ flask run ', but I am unsure how to access the debugger this way? Any help would be much appreciated, thanks!


Submit an answer


This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Andrew SB
DigitalOcean Employee
DigitalOcean Employee badge
February 8, 2018
Accepted Answer

127.0.0.1 is the local loopback interface. It will only be accessible from the server itself. If you need to access it remotely, start the app using:

flask run --host=0.0.0.0

This tells it to bind to all interfaces, including the public network. This will make it available at your public IP address on port 5000.

Do keep in mind this important note from the Flask documentation about why it defaults to running locally:

If you run the server you will notice that the server is only accessible from your own computer, not from any other in the network. This is the default because in debugging mode a user of the application can execute arbitrary Python code on your computer.

Try DigitalOcean for free

Click below to sign up and get $200 of credit to try our products over 60 days!

Sign up

Get our biweekly newsletter

Sign up for Infrastructure as a Newsletter.

Hollie's Hub for Good

Working on improving health and education, reducing inequality, and spurring economic growth? We'd like to help.

Become a contributor

Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.

Welcome to the developer cloud

DigitalOcean makes it simple to launch in the cloud and scale up as you grow — whether you're running one virtual machine or ten thousand.

Learn more
DigitalOcean Cloud Control Panel