[Feature Request] jupyter-style autocomplete in the editor (provide column names for dataframes for instance)

1. When typing in the main editor, there are no completions for column names but there are completions when using the input windows in interactive windows:

1. The method completions (e.g., .dropna()) in the interactive windows only show up for DataFrame not Series. Meanwhile, the editor does not seem to have completions for those common methods at all.

Version: 1.34.0 (user setup)
Python Extension: 2019.5.17517
Commit: a622c65b2c713c890fcf4fbf07cf34049d5fe758
Date: 2019-05-15T21:59:37.030Z
Electron: 3.1.8
Chrome: 66.0.3359.181
Node.js: 10.2.0
V8: 6.6.346.32
OS: Windows_NT x64 10.0.17763

[greazer]

There are at least two people in this thread that are complaining about the inability to autocomplete columns. Jupyter itself supports this. The debug console of VSCode supports it. I ran across this same issue mentioned in another bug by a different customer, and when I tried it myself I got confused as to how the debug console could “do the right thing” but not in the editor. Finally, now that we have debug cell, there’s yet another entry point for more people noticing.

Therefore, I think we need to seriously consider doing something to address this. Moving to re-triage.

[greazer]

Let’s do this. We will assume that most people are using one file with the interactive window. Try to make it work when debugging a cell too.