Add logger.SetLevel() for the fastapi example.

Only then it works in the IPython shell

Author: chr1st1ank

example/fastapi_sample_app.py

@@ -8,6 +8,7 @@
 
 # init the logger as usual
 logger = logging.getLogger(__name__)
+logger.setLevel(logging.DEBUG)
 
 @app.get('/')
 async def home():