Is Stackless Python DEAD?
phr-n2001d at nightsong.com
Mon Oct 29 18:53:00 CET 2001
Donn Cave <donn at u.washington.edu> writes:
> # callback from UI - selected login option
> def login(self):
> name = self.config.loginid
> password = self.getpassword(name) # posts password prompt window
> # Function actually returns from callback ...
> # ... New callback arrives with password requested here; continue!
> self.loginwithpassword(name, password)
> That's arguably more readable than any alternative I ever thought of,
> but then it substantially obscures the "real" flow of control in the
Nice! But really, using callbacks in the first place for things like
this is a kludge designed to get around the lack of
coroutines/continuations/threads whatever. In threaded style you'd
just write getpassword as an ordinary method call that blocks til
the password is entered, then returns.
> Anyway, whether I want to go that way or not (and I don't know for
> myself), it clearly is indeed a meaningful advance, something that
> makes a substantial difference in what you can do with Python.
> Definitely worth looking at, if you have gnarly asynchronous
> programming issues.
I've been toying with the idea of combining a Python parser with a
Scheme implementation, getting continuations and a more serious
compiler/interpreter at the same time. If done in the obvious way
some Python semantics would break, however.
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