old_contents: #!/usr/bin/python
  #
  # Copyright 2013 Red Hat
  # All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License"); you may
  # not use this file except in compliance with the License. You may obtain
  # a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  # License for the specific language governing permissions and limitations
  # under the License.
  
  # Reads in a list of exclude regular expressions from a file and outputs a
  # regex suitable to be passed into testr
  
  import sys
  
  re=[]
  with open(sys.argv[1]) as fp:
      for line in fp:
          line=line.strip()
          if not line: continue
          if line[0] == '#': continue
          re.append(line)
  print "^(?!(%s))" % "|".join(re)
  
new_contents: #!/usr/bin/python
  #
  # Copyright 2013 Red Hat
  # All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License"); you may
  # not use this file except in compliance with the License. You may obtain
  # a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  # License for the specific language governing permissions and limitations
  # under the License.
  
  # Reads in a list of exclude regular expressions from a file and outputs a
  # regex suitable to be passed into testr
  
  import sys
  
  re = []
  with open(sys.argv[1]) as fp:
      for line in fp:
          line = line.strip()
          if not line or line[0] == '#':
              continue
          re.append(line)
  print("^(?!(%s))" % "|".join(re))
  
subject: Fix flake8 failures