QtCreator shows fixed white background behind identifiers in python

[karel_l]

Hi everyone!

I have a problem that's been bothering me in QtCreator for a while. I thought it might be just insufficient python support in the old version I used to use but now I upgraded (to 4.5.2 with Ubuntu 18.04) and it's still there. As you can see on the screenshot below, code outside of the current scope has a darker grey background, but not for identifiers (vars, funcs etc.), those stay white. This happens only for python, other languages I sometimes touch (C++, JS, HTML) are fine.

I went through my Editor settings and checked if I have the background colour hard-coded in any of the settings, but it doesn't seem like I do. Checked on the internet, no results. Anybody would know? Thanks!

Note: might be related, but maybe not, python is also "special" in that it doesn't quite "work" like other languages in QtCreator for me, besides the syntax and scope highlighting I don't have any features - no errors/warning by the editor, no "follow symbol" functionality, no matching bracket highlighting, etc...

[J.Hilk]

hi @karel_l and welcome

you should consider upgrading again, the current latest release of QtCreator is 4.10.2

I believe, the official Qt for Python support was added after 4.5, so you should see significant changes, when you use the latest one.

[aha_1980]

Hi @karel_l,

as @j.hilk said, you should update. 4.11 is around the corner, and Python support is gradually improving.

Regards

[JonB]

Wait: Qt Creator (which I don't use) is now tackling Python syntax?! What about Python debugging??

[J.Hilk]

@JonB said in QtCreator shows fixed white background behind identifiers in python:

What about Python debugging

Is there such a thing?

As far as I know, you can add (in QtC) the "-m trace —trace" as argument to the python call

[JonB]

@J-Hilk
Don't know if you're being serious? PyCharm, which I used before, and VSCode Python, which I use now, have full interactive debugging in the IDEs, just like Qt Creator does for C++/gdb etc.

I'm talking about for developing Qt stuff via PySide2 & Python, in case there's any misunderstanding.

Python is bad enough as it is. You (I) certainly want full-featured visual debugging as for C++...!

[J.Hilk]

@JonB You have to excuse me, but my contact with python is limited to a horrible time during university and a (somewhat) working environment on my Mac to test stuff.

Never bothered with actual debugging.

But hitting the debug run in QtCreator actually starts a Python debugger and holds on the first line, with information etc.

[JonB]

@J-Hilk
Of course I excuse you, I genuinely didn't know if you were messing about in your reply like I do :)

Then it does look like Creator has debugging support, as well as syntax. That's all new to me.

Hmmm. Because Creator didn't do Python a while back (probably pre PySide2), I had to do all work in PyCharm, and now for new project VSCode Python. These are good for editing & debugging, but if you want to use the Qt Designer for the UI you have to do pyuic step separately, not integrated. Which is a pain.

From Creator it would all be integrated. Unfortunately I don't think its support for Python editing/debugging will be good enough yet for me/this project, but it's interesting to know it's heading that way...

[karel_l]

Beautiful, not everything is perfect (bracket highlighting, symbol following, etc.) but the highlighting is functional now, as well as code completion, thanks a lot! And as a bonus I now have also much better support of JavaScript, yay! :)