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Flask is a lightweight web framework for Python that enables the development of web applications with simplicity and flexibility.

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Installation

🐍 Don’t forget to install the AppSignal for Python package in your application first.
First, install the opentelemetry-instrumentation-flask package. To add it to your project, add the following line to your requirements.txt file: 

<PythonDisableInstrumentations />
# requirements.txt
opentelemetry-instrumentation-flask

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Setup

It’s necessary to import and start the AppSignal client before the Flask library is imported. This ensures that the application instance is created with the automatic instrumentation applied. 
# app.py
import appsignal
appsignal.start()

from flask import Flask # noqa: E402
app = Flask(__name__)

# your app code