python-anvil-app-server: can you run the python debuggor pdb or ipdb on the server side code?

Question

• i'm doing some web development with python's anvil-app-server https://pypi.org/project/anvil-app-server/
• i would like to use the debugger because it is a powerful/useful tool on the server side python code
• i generated a hello-world application named ServerSidePdb
• i put pdb and ipdb into the server side callback for the helloworld generated application and got a console output that looks like an error:

Calling function 'say_hello_name' for app 'ServerSidePdb' (ID client-q5jGe8vXpy/ATVXEjmwQAw==)
[DEBUG anvil.app-server.run] [SERVER] > /home/trevor/workspace/anvil/MyApp/ServerModule1.py(13)say_hello_name()
Worker terminated for IDs set() (return code -9)
[DEBUG anvil.app-server.run] [SERVER] (Pdb) 
[ERROR anvil.app-server.run] Error report from client code:
AnvilWrappedError: [unexpected error]
Traceback:
  /usr/lib64/python3.6/bdb.py:70

  /usr/lib64/python3.6/bdb.py:51

  MyApp/ServerModule1.py:13

  MyApp/ServerModule1.py:13

  app/MyApp/Form1/__init__.py:15

can you run the python debuggor pdb or ipdb on the server side code? if yes, how?

Answer 1

• the server side code executes under a java server and the java server captures the stdin/stdout which prevents you from directly running pdb or ipdb
• i've heard vscode has a good remote debug capability so that might be a way to jump into the debugger
  • all the anvil server callbacks have a 30 second timeout
  • so make sure you only try to debug in a anvil background task (or i think the timeout will stop you prematurely)