Solution to no open ports detected on 0 0 0 0 on render | render | port | 0.0.0.0

This is a fix for any of these problem concerning open port when encountered while deploying a web application or an api on render:

== No open ports detected on 0.0.0.0, continuing to scan...
== No open ports detected on 0.0.0.0, continuing to scan...
== No open ports detected on 0.0.0.0, continuing to scan...
== No open ports detected on 0.0.0.0, continuing to scan...
== Port scan timeout reached, no open ports detected on 0.0.0.0. Detected open ports on localhost -- did you mean to bind one of these to 0.0.0.0?
== Timed out: Port scan timeout reached, no open ports detected on 0.0.0.0. Detected open ports on localhost -- did you mean to bind one of these to 0.0.0.0?

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Thanks for this! Any Idea how I can do this in a python application?