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Using highlight.io with Python Flask

Learn how to set up highlight.io on your Python Flask backend API.
1
Setup your frontend Highlight snippet with tracingOrigins.

Make sure that you followed the fullstack mapping guide.

H.init("<YOUR_PROJECT_ID>", { tracingOrigins: ['localhost', 'example.myapp.com/backend'], networkRecording: { enabled: true, recordHeadersAndBody: true, }, });
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2
Install the highlight-io python package.

Download the package from pypi and save it to your requirements. If you use a zip or s3 file upload to publish your function, you will want to make sure highlight-io is part of the build.

poetry add highlight-io[Flask] # or with pip pip install highlight-io[Flask]
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3
Initialize the Highlight SDK.

Setup the SDK to with the Flask integration.

from flask import Flask import highlight_io from highlight_io.integrations.flask import FlaskIntegration app = Flask(__name__) H = highlight_io.H("YOUR_PROJECT_ID", integrations=[FlaskIntegration()], record_logs=True)
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4
Verify your installation.

Check that your installation is valid by throwing an error. Add the following code to your Flask app and start the Flask server. Visit http://127.0.0.1:5000/hello in your browser. You should see a DivideByZero error in the Highlight errors page within a few moments.

import logging import random import time from flask import Flask import highlight_io from highlight_io.integrations.flask import FlaskIntegration app = Flask(__name__) H = highlight_io.H("YOUR_PROJECT_ID", integrations=[FlaskIntegration()], record_logs=True) @app.route("/hello") def hello(): return f"<h1>bad idea { 5/0 }</h1>" if __name__ == "__main__": app.run()
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5
Verify your backend logs are being recorded.

With the Python SDK, your logs are reported automatically from the builtin logging methods (as long as record_logs=True is provided to the highlight_io.H constructor). Visit the highlight logs portal and check that backend logs are coming in.