Cannot step through asynchronous iterator manually
Frank Millman
frank at chagford.com
Sat Jan 30 07:39:44 EST 2016
"Maxime S" wrote in message
news:CAGqiJR8yUdd1u7j0YHS-He_v4uUT-ui=PpiX=n_G=ntt8ZnTpg at mail.gmail.com...
>
> I might be a bit off-topic, but why don't you simply use cursor.rowcount?
>
I just tried that on sqlite3 and pyodbc, and they both return -1.
I think that it only works with insert/update/delete, but not with select.
> For a pure iterator-based solution, I would do something like this
> (admitly
> a bit cryptic, but iterator-based solutions often are :-) :
>
> async def get_uniqu(ait):
> async for row in ait:
> break
> else:
> raise NotEnoughtRows()
> async for _ in ait:
> raise TooManyRows()
> return row
>
Also nice - thanks. I now have a few to choose from without needing an
'anext()'.
Frank
More information about the Python-list
mailing list