When I write " #!!!" in Spyder, it shows a tick on the left. Why?

Question

I am using Anaconda-Spyder in learning Python. I accidentally saw a blue tick on the left when I write #!!! in my source code. Why? What does this mean?

Answer 1

This is a mark for you to allow to highlight places in the code with todo-like comments.

a) In Tools->Preferences dialog go to Editor -> Advanced settings tab and untick Display code annotations. Or don't untick, but find the list of comment tags that cause the blue mark to appear.

b) Don't forget to add a space after # to be pep8-compliant.