Examples of libraries that can be noisy:

* Flask-CORS: When I first started using this it's default logging level was really noisy.

* factory (aka Factory Boy): You can turn in DEBUG level to get a deluge of information about what is happening with your test data.

* SQLAlchemy: The 'echo' option to create_engine isn't the only way that you can control logging. E.g.:

  import logging
  logging.basicConfig()
  logging.getLogger('sqlalchemy.engine').setLevel(logging.INFO)

Using logging_tree will give you a good idea of the loggers that have been initialized on the libraries that you're using.