chore(flake8): fixed flake8 errors (#484)

Author: nan-guo

aiomysql/sa/connection.py

@@ -49,7 +49,7 @@ def execute(self, query, *multiparams, **params):
             )
 
         In the case that a plain SQL string is passed, a tuple or
-        individual values in \*multiparams may be passed::
+        individual values in *multiparams may be passed::
 
             await conn.execute(
                 "INSERT INTO table (id, value) VALUES (%d, %s)",

examples/example_oldstyle.py

@@ -7,9 +7,14 @@
 
 @asyncio.coroutine
 def test_example():
-    conn = yield from aiomysql.connect(host='127.0.0.1', port=3306,
-                                       user='root', password='', db='mysql',
-                                       loop=loop)
+    conn = yield from aiomysql.connect(
+        host='127.0.0.1',
+        port=3306,
+        user='root',
+        password='',
+        db='mysql',
+        loop=loop
+    )
 
     cur = yield from conn.cursor()
     yield from cur.execute("SELECT Host,User FROM user")

examples/example_pool_oldstyle.py

@@ -7,17 +7,22 @@
 
 @asyncio.coroutine
 def test_example():
-        pool = yield from aiomysql.create_pool(host='127.0.0.1', port=3306,
-                                               user='root', password='',
-                                               db='mysql', loop=loop)
-        with (yield from pool) as conn:
-            cur = yield from conn.cursor()
-            yield from cur.execute("SELECT 10")
-            # print(cur.description)
-            (r,) = yield from cur.fetchone()
-            assert r == 10
-        pool.close()
-        yield from pool.wait_closed()
+    pool = yield from aiomysql.create_pool(
+        host='127.0.0.1',
+        port=3306,
+        user='root',
+        password='',
+        db='mysql',
+        loop=loop
+    )
+    with (yield from pool) as conn:
+        cur = yield from conn.cursor()
+        yield from cur.execute("SELECT 10")
+        # print(cur.description)
+        (r,) = yield from cur.fetchone()
+        assert r == 10
+    pool.close()
+    yield from pool.wait_closed()
 
 
 loop.run_until_complete(test_example())

tests/conftest.py

@@ -329,7 +329,7 @@ def mysql_server(unused_port, docker, session_id,
                         cursor.execute('FLUSH PRIVILEGES')
 
                 break
-            except Exception as err:
+            except Exception:
                 time.sleep(delay)
                 delay *= 2
         else: