title: Tuple and list issue while obtaining request from osu!api (Python)
body: <p>I have got an error that I tried to fix for about 6 hours.
  Can anyone help me? Yes, it's Python 3.6, using the osuapi library and discord.py</p>
  
  <pre><code>async def stats(self, ctx):
      stat = _osu.get_user(username=ctx.args[0])
      stats = list(stat)
      embed = discord.Embed(title="osu!stats", description="Using Official osu!api", color=0xfc89ac)
      embed.add_field(name="Уровень", value=stats[0].level)
      embed.add_field(name="Глобальный ранг", value=stats[0].username)
      embed.add_field(name="PP-очки", value=stats[0].username)
      embed.add_field(name="Страна", value=pycountry.countries.get(alpha_2=stats[0].country).name)
      embed.add_field(name="Число игр", value=stats[0].playcount)
      embed.set_author(name=stats[0].username, url="https://osu.ppy.sh/u/"+stats[0].user_id)
      await self.bot.say(Mention.mention(ctx.message.author)+", вот статы игрока "+stats[0].username, embed=embed)
  </code></pre>
  
  <p>Here's the traceback:</p>
  
  <pre><code>    Ignoring exception in command osu stats
  Traceback (most recent call last):
    File "C:\Program Files\Python36\lib\site-packages\osuapi\connectors.py", line 46, in process_request
      resp = yield from self.sess.get(endpoint, params=data)
    File "C:\Program Files\Python36\lib\site-packages\aiohttp\client.py", line 555, in __iter__
      resp = yield from self._coro
    File "C:\Program Files\Python36\lib\site-packages\aiohttp\client.py", line 198, in _request
      conn = yield from self._connector.connect(req)
    File "C:\Program Files\Python36\lib\site-packages\aiohttp\connector.py", line 304, in connect
      yield from self._create_connection(req)
    File "C:\Program Files\Python36\lib\site-packages\aiohttp\connector.py", line 578, in _create_connection
      transport, proto = yield from self._create_direct_connection(req)
    File "C:\Program Files\Python36\lib\site-packages\aiohttp\connector.py", line 589, in _create_direct_connection
      hosts = yield from self._resolve_host(req.host, req.port)
    File "C:\Program Files\Python36\lib\site-packages\aiohttp\connector.py", line 561, in _resolve_host
      self._resolver.resolve(host, port, family=self._family)
    File "C:\Program Files\Python36\lib\site-packages\aiohttp\resolver.py", line 29, in resolve
      host, port, type=socket.SOCK_STREAM, family=family)
  AssertionError: yield from wasn't used with future
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "C:\Program Files\Python36\lib\site-packages\discord\ext\commands\core.py", line 50, in wrapped
      ret = yield from coro(*args, **kwargs)
    File "C:\Users\NukDo\PycharmProjects\nukdotcom\cogs\osu_cog.py", line 21, in stats
      stats = list(stat)
    File "C:\Program Files\Python36\lib\site-packages\osuapi\connectors.py", line 57, in process_request
      resp.close()
  UnboundLocalError: local variable 'resp' referenced before assignment
  
  The above exception was the direct cause of the following exception:
  
  Traceback (most recent call last):
    File "C:\Program Files\Python36\lib\site-packages\discord\ext\commands\bot.py", line 846, in process_commands
      yield from command.invoke(ctx)
    File "C:\Program Files\Python36\lib\site-packages\discord\ext\commands\core.py", line 634, in invoke
      yield from ctx.invoked_subcommand.invoke(ctx)
    File "C:\Program Files\Python36\lib\site-packages\discord\ext\commands\core.py", line 374, in invoke
      yield from injected(*ctx.args, **ctx.kwargs)
    File "C:\Program Files\Python36\lib\site-packages\discord\ext\commands\core.py", line 54, in wrapped
      raise CommandInvokeError(e) from e
  discord.ext.commands.errors.CommandInvokeError: Command raised an exception: UnboundLocalError: local variable 'resp' referenced before assignment
  </code></pre>