Third-party module type annotation support about jupyterlab-lsp

[krassowski]

Thanks for reporting this. I am not sure why it happens (it might be the python server fault, it may be a bug in my extension), but I will definitely investigate it in detail soon.

PS. If you use annotations a lot, have a look at mypy extension of python-language-server:

pip install pyls-mypy

While it does not work as good as the PyCharm's implementation, it does help sometimes:

[simon-ritchie]

Hi, @krassowski

Thanks a lot for your contributions and information (as well as mypy information)!

[simon-ritchie]

Hi.
For some reason I tried this extension today and it worked fine :O

I tried:

• Downgraded ipython version to 7.2.0 and restarted node.js and JupyterLab

I noticed that the console had an error similar to the next issue, so I downgraded ipython yesterday.

...
/site-packages/jedi/api/classes.py", line 345, in params
 raise AttributeError('There are no params defined on this.')
AttributeError: There are no params defined on this.

jupyter/notebook#4364

And the error disappeared but did not improve.

• Installed mypy extension

As you told me, I installed pyls-mypy.

• And today, when I start node.js and JupyterLab again, it works fine...

The reason is not well understood. Sorry :'-(
(Maybe it's ipython, mypy, or some other influence...or maybe I misunderstood because of DataFrame completion was taking time)

Notes: np.array etc. are completed quickly. On the other hand, pd.DataFrame seems to take a lot of time or become unstable. Possibly the large DataFrame code is influencing.

I'll close this issue because it seems to be an effect of other libraries.
Thx!

[simon-ritchie]

I'm not familiar with mypy and typeshed, but maybe type information is loaded with typeshed via mypy, as well as mypy's lint execution.