Use `__dict__` or `vars()`?

Question

Builtin function vars() looks more Pythonic to me, but I see __dict__ used more frequently.

The Python documentation indicates that they ar

Answer 1

I'd use vars().

From: https://wiki.python.org/moin/DubiousPython#Premature_Optimization

While a correctly applied optimization can indeed speed up code, optimizing code that is only seldom use [..] can make code harder to read. [..] Write correct code first, then make it fast (if necessary).

From: The Zen of Python

Readability counts.