Thanks for your replies.
In article <[EMAIL PROTECTED]>,
Arnaud Delobelle <[EMAIL PROTECTED]> writes:
arnodel> def f1():
arnodel> print "f1 start"
arnodel> yield f2,
arnodel> print "f1 foo"
arnodel> v = yield f2,
arnodel> print "f1 v=%s world" % v
arnodel> yield f2, "OK"
arnodel> print "f1 end"
arnodel>
arnodel> def f2():
arnodel> print "f2 start"
arnodel> yield f1,
arnodel> print "f2 bar"
arnodel> result = yield f1, "Hello, "
arnodel> print "f2 result=%s" % result
arnodel> print "f2 end"
arnodel> yield f1,
This is the most simple example. In real programming, things are more
complicate so I will want to refactor it like below:
def foo(fiber, s, arg=None)
print s
return yield fiber, arg
def f1():
foo(f2, "start") # XXX returns generator object
v = foo(f2, "foo")
foo(f2, "v=%s world" % v, "OK")
But current Python generator specification requires me:
def f1():
for x in foo(f2, "foo"): yield x
for x in foo(f2, "foo"): yield x
# XXX v = ... (I don't know how to do this)
for x in foo(f2, "v=%s world" % v, "OK"): yield x
I think it is not straitforward. Single level function which generator
impose is impractical for real use.
In article <[EMAIL PROTECTED]>,
Duncan Booth <[EMAIL PROTECTED]> writes:
duncan.booth> Unfortunately generators only save a single level of stack-frame,
so they
duncan.booth> are not really a replacement for fibers/coroutines. The OP should
perhaps
duncan.booth> look at Stackless Python or Greenlets. See
duncan.booth> http://codespeak.net/py/dist/greenlet.html
I am happy if I could use convenient coroutine features via standard
or simple extension library. py.magic.greenlet may be what I'm
looking for, but I wonder why this is named "magic" :-)
-- kayama
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