Create a get_words method in introspection utils

[goanpeca]

Create a generic function that finds all words in a given source code file (language agnostic)

here
https://github.com/spyder-ide/spyder/blob/master/spyder/utils/introspection/utils.py

To filter out letters or tokens we could use the information stored on pygments.

So that we can make inline completions on word type (like VS CODE does).

We need to write test for a couple of different files (c, C++, python, R, HTML, CSS)

[ccordoba12]

But that's what the fallback completer is doing right now, isn't it?

[goanpeca]

Nope, not for EVERY word... only for special words of the language. Look at VS code

[malliwi88]

Hello @goanpeca @ccordoba12

I have been working on code completion widget.

• Now, I have a change for activating code completion widget always a user input and suggestions exists (key event deferent to modifier events) PR: Automatic "on-the-fly" code completion (i.e. without using Tab) #3708
• An interesting thing is happening (three different behavioral on the widget) as you can see in the gif below

It can be associated with the three actual plugins (Jedi, Rop, fallback ) fight for completion task for same user input text.

I'm planning to have a first PR with this changes.

I think that we are in a good way for having a better code completion feature, thanks for your fantastic suggestions @ccordoba12, @goanpeca