Delete filter_stack.py

stbi/Lib/site-packages/Sqlparse/engine/filter_stack.py

-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2009-2018 the sqlparse authors and contributors
-# <see AUTHORS file>
-#
-# This module is part of python-sqlparse and is released under
-# the BSD License: https://opensource.org/licenses/BSD-3-Clause
-
-"""filter"""
-
-from sqlparse import lexer
-from sqlparse.engine import grouping
-from sqlparse.engine.statement_splitter import StatementSplitter
-
-
-class FilterStack(object):
-    def __init__(self):
-        self.preprocess = []
-        self.stmtprocess = []
-        self.postprocess = []
-        self._grouping = False
-
-    def enable_grouping(self):
-        self._grouping = True
-
-    def run(self, sql, encoding=None):
-        stream = lexer.tokenize(sql, encoding)
-        # Process token stream
-        for filter_ in self.preprocess:
-            stream = filter_.process(stream)
-
-        stream = StatementSplitter().process(stream)
-
-        # Output: Stream processed Statements
-        for stmt in stream:
-            if self._grouping:
-                stmt = grouping.group(stmt)
-
-            for filter_ in self.stmtprocess:
-                filter_.process(stmt)
-
-            for filter_ in self.postprocess:
-                stmt = filter_.process(stmt)
-
-            yield stmt