Noissue - Added flake8-abp and pep8-naming extension and fix reported warnings

abp/filters/parser.py

 # This file is part of Adblock Plus <https://adblockplus.org/>,
 # Copyright (C) 2006-2016 Eyeo GmbH
 #
 # Adblock Plus is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 3 as
 # published by the Free Software Foundation.
 #
 # Adblock Plus is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@@ skipping 40 matching lines @@
 
 
 Header = line_type('Header', 'version', '[{.version}]')
 EmptyLine = line_type('EmptyLine', '', '')
 Comment = line_type('Comment', 'text', '! {.text}')
 Metadata = line_type('Metadata', 'key value', '! {0.key}: {0.value}')
 Filter = line_type('Filter', 'expression', '{.expression}')
 Include = line_type('Include', 'target', '%include {0.target}%')
 
 
-METADATA_REGEXP = re.compile('!\s*(\w+)\s*:\s*(.*)')
+METADATA_REGEXP = re.compile(r'!\s*(\w+)\s*:\s*(.*)')
 METADATA_KEYS = {'Homepage', 'Title', 'Expires', 'Checksum', 'Redirect',
                  'Version'}
-INCLUDE_REGEXP = re.compile('%include\s+(.+)%')
-HEADER_REGEXP = re.compile('\[(Adblock(?:\s*Plus\s*[\d\.]+?)?)\]', flags=re.I)
+INCLUDE_REGEXP = re.compile(r'%include\s+(.+)%')
+HEADER_REGEXP = re.compile(r'\[(Adblock(?:\s*Plus\s*[\d\.]+?)?)\]', flags=re.I)
 
 
 def _parse_comment(text):
     match = METADATA_REGEXP.match(text)
     if match and match.group(1) in METADATA_KEYS:
         return Metadata(match.group(1), match.group(2))
     return Comment(text[1:].strip())
 
 
 def _parse_header(text):
@@ skipping 36 matching lines @@
 
 def parse_filterlist(lines):
     """Parse filter list from an iterable.
 
     :param lines: List of strings or file or other iterable.
     :returns: Iterator over parsed lines.
     :raises ParseError: Can be thrown during iteration for invalid lines.
     """
     for line in lines:
         yield parse_line(line)