python - pycharm code style problem

Question

Why is there a background color at the bottom of that code? Where to turn it off? It is the latest version in 2017.
pep8 is closed.

Answer 1

settings-Editor-Colors & Fonts-General
Find Code - Injected language fragment and modify the Background on the right side of it.
I found it by accident.

Answer 2

If the above method doesn’t work. Just go to the settings and take a look. Maybe your regular expression sets the foreground or background color.
The specific location is as shown below: