Where does this come from: -*- coding: utf-8 -*-

Question

Python recognizes the following as instruction which defines file\'s encoding:

# -*- coding: utf-8 -*-

I definitely saw this kind of instru

Answer 1

# -*- coding: utf-8 -*- is a Python 2 thing. In Python 3+, the default encoding of source files is already UTF-8 and that line is useless.

See: Should I use encoding declaration in Python 3?

pyupgrade is a tool you can run on your code to remove those comments and other no-longer-useful leftovers from Python 2, like having all your classes inherit from object.