[Python-Dev] PEP 492 vs. PEP 3152, new round (original) (raw)

Greg Ewing greg.ewing at canterbury.ac.nz
Thu Apr 30 00:46:55 CEST 2015

Yury Selivanov wrote:

I'm not sure why Greg is pushing his Grammar idea so aggressively.

Because I believe that any extra complexity in the grammar needs a very strong justification. It's complexity in the core language, like a new keyword, so it puts a burden on everyone's brain.

Saying "I don't think anyone would ever need to write this, therefore we should disallow it" is not enough, given that there is a substantial cost to disallowing it.

If you don't think there's a cost, consider that we both seem to be having trouble predicting the consequences of your proposed syntax, and you're the one who invented it. That's not a good sign!

-- Greg

More information about the Python-Dev mailing list