[Python-Dev] PEP 572: Write vs Read, Understand and Control Flow (original) (raw)

Steven D'Aprano steve at pearwood.info
Wed Jul 4 07:35:40 EDT 2018

On Wed, Jul 04, 2018 at 03:21:29PM +0400, Abdur-Rahmaan Janhangeer wrote:

was going to tell

instead of := maybe => better := too close to other langs

The fact that := will be familiar to many people (especially if they know Go, Pascal or Eiffel etc) is a point in its favour.

https://en.wikipedia.org/wiki/Assignment_%28computer_science%29#Notation

The => arrow puts the arguments around the "wrong" way compared to regular assignment:

name = expression
expression => name

Although personally I like that order, many people did not and I think Guido ruled it out very early in the discussion.

Also it may be too easily confused with <= or >= or the -> syntax from annotations.

-- Steve

More information about the Python-Dev mailing list