On 11/22/2013 7:00 PM, Terry Reedy wrote:
On 11/22/2013 4:30 PM, Tobias M. wrote:
[snip callback versions by Tobias and me]
2. How would you implement the second approach from the PEP (using a
coroutine) with the same interface as my PeriodicTask above?
Theoretically, by Guido's rationale, that should be easier (for me, at
least), since it would be more like the kind of Python code I already
write.
I tried the second approach but wasn't able to come up with a solution,
as I was too confused by the concepts of coroutines, Tasks, etc.
I will try to look at the PEP and see how it works for me.
I was initially baffled also until I managed to assemble all the needed
pieces.
import asyncio
def f():
print('Hello World')
@asyncio.coroutine
def g(func, interval):
while True:
yield from asyncio.sleep(interval)
func()
loop = asyncio.get_event_loop()
try:
loop.run_until_complete(asyncio.Task(g(f, 2)))
except KeyboardInterrupt:
print('Loop stopped')
I think Guido's point is that async generator version is quite similar
to the 'normal' synchronous version.
import time
def f():
print('Hello World')
def h(func, interval):
while True:
time.sleep(interval)
func()
try:
h(f, 2))
except KeyboardInterrupt:
print('Loop stopped')
--
Terry Jan Reedy
--
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