We start by adding two libraries for the tracing to our project: jaeger-client and flask_opentracing. flask-opentracing adds tracing into Flask projects so that you can easily have all HTTP endpoints traced automatically. The OpenTracing project doesn't include any collectors, so we also need a library to collect and send the trace data somewhere, in this case, jaeger-client.
The example also adds the requests library, as in this example we will add an HTTP endpoint that makes a remote request, processes the responses, and returns the values—and add tracing to that sequence.
Importing the libraries and initializing the tracer is fairly straightforward:
import opentracingfrom jaeger_client import ...
