When running with python 3.6.6, with aiohttp 3.3.2, the 'flags_asyncio.py' script outputs 20 pairs of lines similar to this:
Unclosed client sessionclient_session: <aiohttp.client.ClientSession object at 0x10ecbfd68>
followed by 20 tracebacks similar to this:
Task exception was never retrievedfuture: <Task finished coro=<download_one() done, defined at flags_asyncio.py:28>exception=TypeError("'_SessionRequestContextManager' object is not iterable",)>Traceback (most recent call last):File "flags_asyncio.py", line 30, in download_oneimage = yield from get_flag(cc) # <7>File "flags_asyncio.py", line 23, in get_flagresp = yield from aiohttp.request('GET', url) # <4>TypeError: '_SessionRequestContextManager' object is not iterable
Pull request #26 would address this issue. Obviously it would be out of sync with the book contents, but it would actually work and produce a positive result.
When running with python 3.6.6, with aiohttp 3.3.2, the 'flags_asyncio.py' script outputs 20 pairs of lines similar to this:
Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x10ecbfd68>
followed by 20 tracebacks similar to this:Task exception was never retrieved
future: <Task finished coro=<download_one() done, defined at flags_asyncio.py:28>
exception=TypeError("'_SessionRequestContextManager' object is not iterable",)>
Traceback (most recent call last):
File "flags_asyncio.py", line 30, in download_one
image = yield from get_flag(cc) # <7>
File "flags_asyncio.py", line 23, in get_flag
resp = yield from aiohttp.request('GET', url) # <4>
TypeError: '_SessionRequestContextManager' object is not iterable