Hello!
I am just trying to get familiar with asyncio. It seems to be a good thing,
however, I am still having troubles and feel pretty puzzled although I think I
got the point what async IO means. This is the problem I am trying to
accomplish:
I have some functions which are reading values from hardware. If one of the
values changes, I want a corresponding notification to the connected clients.
The network part shouldn't be the problem. Here is what I got so far:
@asyncio.coroutine
def check():
old_val = read_value_from_device()
yield from asyncio.sleep(2)
new_val = read_value_from_device()
# we may have fluctuations, so we introduce a threshold
if abs(new_val-old_val) > 0.05:
return new_val
else:
return None
@asyncio.coroutine
def runner():
while 1:
new = yield from check()
print(new)
loop = asyncio.get_event_loop()
loop.run_until_complete(update())
Is this the way one would accomplish this task? Or are there better ways?
Should read_value_from_device() be a @coroutine as well? It may contain parts
that take a while ... Of course, instead of print(new) I would add the
corresponding calls for notifying the client about the update.
Thanks!
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