Ignore flake8 F401 on specific files

Uses the flake8 option per-file-ignores that was introduced in a recent
version of flake8 (3.7.+) to avoid having lots of "noqa" in import
only files

Change-Id: Ib4871d63bad7e578165615df139cbf6093479201

1 files changed, 88 insertions, 88 deletions

diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py
index 46f13fedd..f47dc5fdf 100644
--- a/lib/sqlalchemy/sql/expression.py
+++ b/lib/sqlalchemy/sql/expression.py
@@ -92,94 +92,94 @@ __all__ = [
 ]
 
 
-from .base import _from_objects  # noqa
-from .base import _select_iterables  # noqa
-from .base import ColumnCollection  # noqa
-from .base import Executable  # noqa
-from .base import PARSE_AUTOCOMMIT  # noqa
-from .dml import Delete  # noqa
-from .dml import Insert  # noqa
-from .dml import Update  # noqa
-from .dml import UpdateBase  # noqa
-from .dml import ValuesBase  # noqa
-from .elements import _truncated_label  # noqa
-from .elements import between  # noqa
-from .elements import BinaryExpression  # noqa
-from .elements import BindParameter  # noqa
-from .elements import BooleanClauseList  # noqa
-from .elements import Case  # noqa
-from .elements import Cast  # noqa
-from .elements import ClauseElement  # noqa
-from .elements import ClauseList  # noqa
-from .elements import collate  # noqa
-from .elements import CollectionAggregate  # noqa
-from .elements import ColumnClause  # noqa
-from .elements import ColumnElement  # noqa
-from .elements import Extract  # noqa
-from .elements import False_  # noqa
-from .elements import FunctionFilter  # noqa
-from .elements import Grouping  # noqa
-from .elements import Label  # noqa
-from .elements import literal  # noqa
-from .elements import literal_column  # noqa
-from .elements import not_  # noqa
-from .elements import Null  # noqa
-from .elements import outparam  # noqa
-from .elements import Over  # noqa
-from .elements import quoted_name  # noqa
-from .elements import ReleaseSavepointClause  # noqa
-from .elements import RollbackToSavepointClause  # noqa
-from .elements import SavepointClause  # noqa
-from .elements import TextClause  # noqa
-from .elements import True_  # noqa
-from .elements import Tuple  # noqa
-from .elements import TypeClause  # noqa
-from .elements import TypeCoerce  # noqa
-from .elements import UnaryExpression  # noqa
-from .elements import WithinGroup  # noqa
-from .functions import func  # noqa
-from .functions import Function  # noqa
-from .functions import FunctionElement  # noqa
-from .functions import modifier  # noqa
-from .lambdas import lambda_stmt  # noqa
-from .lambdas import LambdaElement  # noqa
-from .lambdas import StatementLambdaElement  # noqa
-from .operators import ColumnOperators  # noqa
-from .operators import custom_op  # noqa
-from .operators import Operators  # noqa
-from .selectable import Alias  # noqa
-from .selectable import AliasedReturnsRows  # noqa
-from .selectable import CompoundSelect  # noqa
-from .selectable import CTE  # noqa
-from .selectable import Exists  # noqa
-from .selectable import FromClause  # noqa
-from .selectable import FromGrouping  # noqa
-from .selectable import GenerativeSelect  # noqa
-from .selectable import HasCTE  # noqa
-from .selectable import HasPrefixes  # noqa
-from .selectable import HasSuffixes  # noqa
-from .selectable import Join  # noqa
-from .selectable import LABEL_STYLE_DEFAULT  # noqa
-from .selectable import LABEL_STYLE_DISAMBIGUATE_ONLY  # noqa
-from .selectable import LABEL_STYLE_NONE  # noqa
-from .selectable import LABEL_STYLE_TABLENAME_PLUS_COL  # noqa
-from .selectable import Lateral  # noqa
-from .selectable import ReturnsRows  # noqa
-from .selectable import ScalarSelect  # noqa
-from .selectable import Select  # noqa
-from .selectable import Selectable  # noqa
-from .selectable import SelectBase  # noqa
-from .selectable import Subquery  # noqa
-from .selectable import subquery  # noqa
-from .selectable import TableClause  # noqa
-from .selectable import TableSample  # noqa
-from .selectable import TableValuedAlias  # noqa
-from .selectable import TextAsFrom  # noqa
-from .selectable import TextualSelect  # noqa
-from .selectable import Values  # noqa
-from .traversals import CacheKey  # noqa
-from .visitors import Visitable  # noqa
-from ..util.langhelpers import public_factory  # noqa
+from .base import _from_objects
+from .base import _select_iterables
+from .base import ColumnCollection
+from .base import Executable
+from .base import PARSE_AUTOCOMMIT
+from .dml import Delete
+from .dml import Insert
+from .dml import Update
+from .dml import UpdateBase
+from .dml import ValuesBase
+from .elements import _truncated_label
+from .elements import between
+from .elements import BinaryExpression
+from .elements import BindParameter
+from .elements import BooleanClauseList
+from .elements import Case
+from .elements import Cast
+from .elements import ClauseElement
+from .elements import ClauseList
+from .elements import collate
+from .elements import CollectionAggregate
+from .elements import ColumnClause
+from .elements import ColumnElement
+from .elements import Extract
+from .elements import False_
+from .elements import FunctionFilter
+from .elements import Grouping
+from .elements import Label
+from .elements import literal
+from .elements import literal_column
+from .elements import not_
+from .elements import Null
+from .elements import outparam
+from .elements import Over
+from .elements import quoted_name
+from .elements import ReleaseSavepointClause
+from .elements import RollbackToSavepointClause
+from .elements import SavepointClause
+from .elements import TextClause
+from .elements import True_
+from .elements import Tuple
+from .elements import TypeClause
+from .elements import TypeCoerce
+from .elements import UnaryExpression
+from .elements import WithinGroup
+from .functions import func
+from .functions import Function
+from .functions import FunctionElement
+from .functions import modifier
+from .lambdas import lambda_stmt
+from .lambdas import LambdaElement
+from .lambdas import StatementLambdaElement
+from .operators import ColumnOperators
+from .operators import custom_op
+from .operators import Operators
+from .selectable import Alias
+from .selectable import AliasedReturnsRows
+from .selectable import CompoundSelect
+from .selectable import CTE
+from .selectable import Exists
+from .selectable import FromClause
+from .selectable import FromGrouping
+from .selectable import GenerativeSelect
+from .selectable import HasCTE
+from .selectable import HasPrefixes
+from .selectable import HasSuffixes
+from .selectable import Join
+from .selectable import LABEL_STYLE_DEFAULT
+from .selectable import LABEL_STYLE_DISAMBIGUATE_ONLY
+from .selectable import LABEL_STYLE_NONE
+from .selectable import LABEL_STYLE_TABLENAME_PLUS_COL
+from .selectable import Lateral
+from .selectable import ReturnsRows
+from .selectable import ScalarSelect
+from .selectable import Select
+from .selectable import Selectable
+from .selectable import SelectBase
+from .selectable import Subquery
+from .selectable import subquery
+from .selectable import TableClause
+from .selectable import TableSample
+from .selectable import TableValuedAlias
+from .selectable import TextAsFrom
+from .selectable import TextualSelect
+from .selectable import Values
+from .traversals import CacheKey
+from .visitors import Visitable
+from ..util.langhelpers import public_factory
 
 # factory functions - these pull class-bound constructors and classmethods
 # from SQL elements and selectables into public functions.  This allows