One way to debug a Flask application is to use the built-in Python debugger, pdb. For example, if you have an application with a route like this:
@app.route(‘/’)
def index():
return ‘Hello World’
You can add the following code to the route to enable debugging:
import pdb
@app.route(‘/’)
def index():
pdb.set_trace()
return ‘Hello World’
Then, when you run the application, it will pause at the pdb.set_trace() line, allowing you to inspect variables, step through code, and so on.