Merge pull request #12

* Clean up python

* Clean up bot python

* revert lists

* revert commands.bot completely

* extract raise_expected_coro further

* add new lines

* removed erroneous import

* remove hashed line

discord/ext/tasks/__init__.py

@@ -46,7 +46,9 @@ import traceback
 
 from collections.abc import Sequence
 from discord.backoff import ExponentialBackoff
-from discord.utils import MISSING
+from discord.utils import MISSING, raise_expected_coro
+
+
 
 __all__ = (
     'loop',
@@ -488,11 +490,7 @@ class Loop(Generic[LF]):
             The function was not a coroutine.
         """
 
-        if not inspect.iscoroutinefunction(coro):
-            raise TypeError(f'Expected coroutine function, received {coro.__class__.__name__!r}.')
-
-        self._before_loop = coro
-        return coro
+        return raise_expected_coro(coro, f'Expected coroutine function, received {coro.__class__.__name__!r}.')
 
     def after_loop(self, coro: FT) -> FT:
         """A decorator that register a coroutine to be called after the loop finished running.
@@ -516,11 +514,7 @@ class Loop(Generic[LF]):
             The function was not a coroutine.
         """
 
-        if not inspect.iscoroutinefunction(coro):
-            raise TypeError(f'Expected coroutine function, received {coro.__class__.__name__!r}.')
-
-        self._after_loop = coro
-        return coro
+        return raise_expected_coro(coro, f'Expected coroutine function, received {coro.__class__.__name__!r}.')
 
     def error(self, coro: ET) -> ET:
         """A decorator that registers a coroutine to be called if the task encounters an unhandled exception.
@@ -542,11 +536,7 @@ class Loop(Generic[LF]):
         TypeError
             The function was not a coroutine.
         """
-        if not inspect.iscoroutinefunction(coro):
-            raise TypeError(f'Expected coroutine function, received {coro.__class__.__name__!r}.')
-
-        self._error = coro  # type: ignore
-        return coro
+        return raise_expected_coro(coro, f'Expected coroutine function, received {coro.__class__.__name__!r}.')
 
     def _get_next_sleep_time(self) -> datetime.datetime:
         if self._sleep is not MISSING:
@@ -614,8 +604,7 @@ class Loop(Generic[LF]):
                 )
             ret.append(t if t.tzinfo is not None else t.replace(tzinfo=utc))
 
-        ret = sorted(set(ret))  # de-dupe and sort times
-        return ret
+        return sorted(set(ret))
 
     def change_interval(
         self,