Correct code style

Author: Peng Ren

.flake8

@@ -1,2 +1,3 @@
 [flake8]
-max-line-length = 120
+max-line-length = 120
+exclude = */partiql/*.py

pymongosql/common.py

@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 import logging
 from abc import ABCMeta, abstractmethod
-from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union
+from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple
 
-from .error import ProgrammingError, OperationalError
+from .error import ProgrammingError
 
 if TYPE_CHECKING:
     from .connection import Connection

pymongosql/error.py

@@ -13,34 +13,45 @@
 ]
 
 
-class Error(Exception): ...
+class Error(Exception):
+    pass
 
 
-class Warning(Exception): ...
+class Warning(Exception):
+    pass
 
 
-class SqlSyntaxError(Error): ...
+class SqlSyntaxError(Error):
+    pass
 
 
-class InterfaceError(Error): ...
+class InterfaceError(Error):
+    pass
 
 
-class DatabaseError(Error): ...
+class DatabaseError(Error):
+    pass
 
 
-class InternalError(DatabaseError): ...
+class InternalError(DatabaseError):
+    pass
 
 
-class OperationalError(DatabaseError): ...
+class OperationalError(DatabaseError):
+    pass
 
 
-class ProgrammingError(DatabaseError): ...
+class ProgrammingError(DatabaseError):
+    pass
 
 
-class IntegrityError(DatabaseError): ...
+class IntegrityError(DatabaseError):
+    pass
 
 
-class DataError(DatabaseError): ...
+class DataError(DatabaseError):
+    pass
 
 
-class NotSupportedError(DatabaseError): ...
+class NotSupportedError(DatabaseError):
+    pass