How come python code suggestion is awful in notebooks and spyder? Smetimes it shows classes methods and variables, sometimes not
If you are working locally (running e.g. starting up a Jupyter notebook from a terminal on localhost) code completiong should work just fine - I have never had any problems.
If you are running a Jupyter notebook attached to a Python process in a Docker container, there can be issues with code completion (the two-way communication may need to be activated).
You can try running the following
ipython "magic command" that makes the interpreter greedy - this has worked for me in the past:
%config IPCompleter.greedy = True
Simply run that in the first Jupyter cell.
Here is a list of all built-in magic commands.
I am afraid I don't know of any differences in these cases between jupyter notebooks and Spyder.