I recently did a full reinstall of Anaconda distribution because of some user-related problems I was having. I installed the latest 64-bit version for Windows 10, and my Jupyter Notebook stopped autocompleting just about everything (methods, library names, object attributes, etc.).
My current version is 7.19.0.
>>> conda list ipython
# packages in environment at D:\Users\my_user\Anaconda3:
#
# Name Version Build Channel
ipython 7.19.0 py38hd4e2768_0
ipython_genutils 0.2.0 pyhd3eb1b0_1
Prior to reinstalling, I was able to press the tab key when typing the first few characters of an object/library and the IDE would display a dropdown list of objects that started with the same string. I cannot get said list to display on the current version.
For some reason however, when I type a function's name, I can still press shift + tab to display the docstring and expected arguments. It's only the dropdown list that disappeared.
I have not been able to find a solution (despite other users are having this issue).