Mailman 3 PEP 649: Deferred Evaluation Of Annotations Using Descriptors, round 2 - Python-Dev

11 Apr 2021

      Attached is my second draft of PEP 649.  The PEP and the prototype have 
both seen a marked improvement since round 1 in January; PEP 649 now 
allows annotations to refer to any variable they could see under stock 
semantics:

  * Local variables in the current function scope or in enclosing
    function scopes become closures and use LOAD_DEFER.
  * Class variables in the current class scope are made available using
    a new mechanism, in which the class dict is attached to the bound
    annotation function, then loaded into f_locals when the annotation
    function is run.  Thus permitting LOAD_NAME opcodes to function
    normally.

I look forward to your comments,

//arry/

PEP 649: Deferred Evaluation Of Annotations Using Descriptors, round 2

Larry Hastings

tags

participants (14)