我有以下代码
session = aiohttp.ClientSession()
async def fetch(session, url):
while True:
try:
async with session.get(url) as response:
assert response.status == 200
return await response.json()
except Exception as error:
print(error)
class FPL():
async def get_player_summaries(self, player_ids=[], return_json=False):
tasks = [asyncio.ensure_future(
fetch(session, API_URLS["player"].format(player_id)))
for player_id in player_ids]
player_summaries = await asyncio.gather(*tasks)
if return_json:
return player_summaries
return [PlayerSummary(player_summary)
for player_summary in player_summaries]
async def get_points_against(self):
players = await self.get_players(return_json=True)
player_ids = [player["id"] for player in players]
player_summaries = await self.get_player_summaries(
player_ids, return_json=True)
points_against = {}
for player in players:
try:
player_summary = next(
summary for summary in player_summaries
if summary["history"][0]["element"] == player["id"])
except Exception:
continue
player.update(player_summary)
position = position_converter(player["element_type"]).lower()
for fixture in player["history"]:
if fixture["minutes"] == 0:
continue
points = fixture["total_points"]
opponent = team_converter(fixture["opponent_team"])
location = "H" if fixture["was_home"] else "A"
points_against.setdefault(
opponent,
{
"all": {"H": [], "A": []},
"goalkeeper": {"H": [], "A": []},
"defender": {"H": [], "A": []},
"midfielder": {"H": [], "A": []},
"forward": {"H": [], "A": []}
}
)
points_against[opponent]["all"][location].append(points)
points_against[opponent][position][location].append(points)
return points_against
这样使用
from fpl import FPL
import asyncio
loop = asyncio.get_event_loop()
fpl = FPL()
x = loop.run_until_complete(fpl.get_points_against())
print(x)
这可以正常工作，并且可以打印x，但同时伴随以下警告
Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x7fa2138111d0>
Unclosed connector
connections: ['[(<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffac48>, 7377.304262674), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8ee8>, 7377.305252688), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8fa8>, 7377.306179118), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9528>, 7377.306921374), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc91c8>, 7377.307587193), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9d08>, 7377.308546534), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030be8>, 7377.324784641), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8b88>, 7377.325538414), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa4c8>, 7377.326132111), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc92e8>, 7377.327035234), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030fa8>, 7377.327984252), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8408>, 7377.328409375), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa5e8>, 7377.329149849), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8a08>, 7377.329776115), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa1c8>, 7377.330400698), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3708>, 7377.331131844), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8be8>, 7377.331974929), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3e88>, 7377.332880665), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3fa8>, 7377.339996297), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa168>, 7377.34077951), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3768>, 7377.341734826), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3dc8>, 7377.342455072), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9288>, 7377.343152698), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa228>, 7377.343844791), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3c48>, 7377.344872661), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3d08>, 7377.34534166), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffaee8>, 7377.346136623), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3408>, 7377.346773908), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa828>, 7377.347680292), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8348>, 7377.34843671), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c0305e8>, 7377.349162388), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3f48>, 7377.349909575), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffab88>, 7377.350612879), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffaa68>, 7377.351261815), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa588>, 7377.352141721), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8168>, 7377.352916437), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c0307c8>, 7377.353702472), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa3a8>, 7377.354645898), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030708>, 7377.355418555), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd32e8>, 7377.356222696), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030d08>, 7377.356890307), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030828>, 7377.357748581), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc98e8>, 7377.358468552), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe89a8>, 7377.36431476), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c0309a8>, 7377.365148168), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030648>, 7377.365791136), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa528>, 7377.36643204), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030dc8>, 7377.367176097), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c0308e8>, 7377.367818125), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9708>, 7377.36853057), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030ac8>, 7377.369177849), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030e88>, 7377.369894806), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa048>, 7377.370589053), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8e28>, 7377.371427258), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9ee8>, 7377.37224736), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8588>, 7377.372942966), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3048>, 7377.373591994), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe86a8>, 7377.374399274), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa0a8>, 7377.374866638), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3288>, 7377.375751613), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8528>, 7377.376432785), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd39a8>, 7377.377390439), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c2fcd68>, 7377.381260399), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe83a8>, 7377.382196696), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030a68>, 7377.382944559), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c030ee8>, 7377.3833559), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8468>, 7377.383995208), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffabe8>, 7377.38498033), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9c48>, 7377.385649648), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9108>, 7377.38617506), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c52bfa8>, 7377.388227618), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c52bf48>, 7377.388934452), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8d08>, 7377.393284709), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8108>, 7377.394200951), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9ca8>, 7377.395036827), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffae28>, 7377.396141727), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9b28>, 7377.396889149), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8888>, 7377.397542457), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa768>, 7377.398182665), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffaca8>, 7377.398876879), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9be8>, 7377.399550454), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa6a8>, 7377.400299738), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8288>, 7377.401028687), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c35a648>, 7377.401664671), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9648>, 7377.402413862), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8828>, 7377.403071713), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3228>, 7377.407205263), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9d68>, 7377.408117483), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa288>, 7377.40877989), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20d570be8>, 7377.409435516), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc96a8>, 7377.409980892), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffa468>, 7377.410663022), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe81c8>, 7377.411396958), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9a68>, 7377.412164899), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fc9348>, 7377.412951192), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3468>, 7377.413625465), (<aiohttp.client_proto.ResponseHandler object at 0x7fa20c52bee8>, 7377.414277707), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207ffad68>, 7377.414928317), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fe8ac8>, 7377.415578122), (<aiohttp.client_proto.ResponseHandler object at 0x7fa207fd3b88>, 7377.415948294)]']
connector: <aiohttp.connector.TCPConnector object at 0x7fa20d72c710>
FPL类还具有许多其他功能，所有这些功能似乎都可以正常工作，因此我只能假定会话已已关闭（会话未关闭可能是由于大量请求（〜570），而其他请求<30）。我试图通过将会话作为传递给该类的参数，然后在之后将其关闭来更改类，但这似乎也不起作用。在文档中提到了会话上下文管理器的使用不是强制性的，但是在这种情况下应调用await session.close()方法。由于我在课堂上使用它的方式不起作用，因此它可能不是实例化session的正确方法。
您应该如何在课堂上使用aiohttp ClientSession？
答案 0 :(得分：3)
如果您发现嵌套上下文管理器不方便，或者希望简化类的使用而不注入会话，则可以将这些方法添加到类中
def __del__(self):
try:
loop = asyncio.get_event_loop()
asyncio.create_task(self._close_session())
except RuntimeError:
loop = asyncio.new_event_loop()
loop.run_until_complete(self._close_session())
async def _close_session(self):
if not self.session.closed:
await self.session.close()
async def _create_session(self):
self.session = aiohttp.ClientSession(connector=aiohttp.TCPConnector(limit=self.tcp_connections))
答案 1 :(得分：2)
您是否要关闭课程的会话没有什么区别。用
关闭它await session.close()
get_points_against末尾的某个位置。如果由于某种原因它对您不起作用–请使用最少的代码对其进行测试，然后在此处发布。像
import asyncio
from aiohttp import ClientSession
session = ClientSession()
async def fetch(session, url):
async with session.get(url) as r:
return (await r.read())[:100]
class Getter:
async def print_data(self):
urls = ['https://stackoverflow.com', 'https://google.com']
for result in await asyncio.gather(*[fetch(session, url) for url in urls]):
print(result)
await session.close()
loop = asyncio.get_event_loop()
g = Getter()
loop.run_until_complete(g.print_data())
使用await session.close()可以正常工作，并发出与您相同的警告-没有。
侧面说明：aiohttp强烈反对在coros之外创建会话。
答案 2 :(得分：0)
我认为您应该在外部使用ClientSession管理
async def main():
async with aiohttp.ClientSession() as session:
fpl = FPL(session)
x = await fpl.get_points_againts()
print(x)
class FPL:
def __init__(self, session):
self.session = session
async def get_player_summaries(self, player_ids=[], return_json=False):
tasks = [asyncio.ensure_future(
fetch(self.session, API_URLS["player"].format(player_id)))
for player_id in player_ids]
# ...
# ...
if __name__ == '__main__':
asyncio.run(main)
顺便说一句。看到类似的问题：nested "async with" using aiohttp