correct import for isort

databases/core.py

@@ -7,14 +7,13 @@
 from types import TracebackType
 from urllib.parse import SplitResult, parse_qsl, unquote, urlsplit
 
+from pymysql.err import OperationalError
 from sqlalchemy import text
 from sqlalchemy.sql import ClauseElement
 
 from databases.importer import import_from_string
 from databases.interfaces import DatabaseBackend, Record
 
-from pymysql.err import OperationalError
-
 try:  # pragma: no cover
     import click
 
@@ -415,7 +414,7 @@ async def commit(self) -> None:
             await self._transaction.commit()
             await self._connection.__aexit__()
 
-    async def rollback(self,skip=False) -> None:
+    async def rollback(self, skip=False) -> None:
         async with self._connection._transaction_lock:
             assert self._connection._transaction_stack[-1] is self
             self._connection._transaction_stack.pop()