[Python-Dev] Extended Function syntax (original) (raw)

Samuele Pedroni pedronis@bluewin.ch
Sun, 2 Feb 2003 20:21:05 +0100

From: "Samuele Pedroni" <pedronis@bluewin.ch>

From: "Guido van Rossum" <guido@python.org> > I think so far I've been thinking mostly about fitting my proposal on > all edges (that's where my discussion of the thunk's scope comes > from). Maybe I should try to focus more on collecting real-world > examples that are asking for syntactic support, and then try to look > for the simplest way to support most of them.

yes, real-world examples would be good.

In particular real-world examples, not covered by 'for' and generators or 'with'*, that need rebinding the surrounding function locals and/or non-local return.

[Just for fun, on the hackery/contrived side of things, we would finally get a version of Paul Graham's accumulator generator http://www.paulgraham.com/accgen.html with mostly lisp-y length:

def accmaker(n): do acc = (lambda x:x): (i): n += i value n # ! not 'return', that would be a non-local return return acc

]

with :

would be possibly sugar for:

_x = _x.enter() try: finally: _x.exit()

OR:

_x = _x.enter() try: try: except getattr(_x,'excepts',()),_e: _x.except(_e) finally: _x.exit()