“I'm basically giving myself a permanent vacation from being BDFL”

Background ("PEP 572 and decision-making in Python"):

https://lwn.net/Articles/757713/

> The problem with the C-style of assignments is that it leads to this classic error: if(x = 0) {...}

yeah, if you code on 20 years old compilers with no warnings. GCC 4.1 warns about this (with -Wall) and Clang 3.4 warns about this too, without any warning flag.

I think that having strong opinions on how others should be developing software is how communities become toxic like this.

"Shooting yourself in the foot is your fault for not using a linter that detects accidental misuse of assignment!"

I'm still puzzled to why would a compiler allow assignment in an explicit conditional (outside of loop syntax). It's like a baked-in blindspot that most people just want to ignore for some reason. Some languages actually guard against this well enough (eg Kotlin) and say "don't". Even with guards in place, it's not all that complicated to work around in the edge cases where you might want to do it.

Because assignment is an expression. It has nothing specifically to do with the position being a conditional.

Conditionals need an expression, and assignment fits the bill, so it works.