[Python-Dev] Generator protocol? (Re: Sets: elt in dict, lst.include)
Greg Ewing
greg@cosc.canterbury.ac.nz
2001年2月01日 12:54:45 +1300 (NZDT)
Moshe Zadka <moshez@zadka.site.co.il>:
> Tim's "try to use that to write something that
> will return the nodes of a binary tree" still haunts me.
Instead of an iterator protocol, how about a generator
protocol? Now that we're getting nested scopes, it should
be possible to arrange it so that
for x in thing:
...stuff...
gets compiled as something like
def _body(x):
...stuff...
thing.__generate__(_body)
(Actually it would be more complicated than that - for
backward compatibility you'd want a new bytecode that
would look for a __generator__ attribute and emulate
the old iteration protocol otherwise.)
Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury, | A citizen of NewZealandCorp, a |
Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. |
greg@cosc.canterbury.ac.nz +--------------------------------------+