old_contents: # Copyright (c) 2015 OpenStack Foundation.
  # 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.
  from random import Random
  
  
  class BloomFilter(object):
      def __init__(self, num_bytes, num_probes, iterable=()):
          """Bloom filter implementation
  
          Example: Check if number in set
  
          >>> bf = BloomFilter(8, 2, (123, 321, 213, 3123))
          >>> 123 in bf
          True
          >>> 456 in bf
          False
  
          :param num_bytes: Number of bytes in the filter
          :type num_bytes: int
          :param num_probes: Number of bloom filter probes
          :type num_probes: int
          :param iterable: Iterable set of items to create the filter from
          """
          self._array = bytearray(num_bytes)
          self._num_probes = num_probes
          self._num_bits = num_bytes * 8
          self.update(iterable)
  
      @property
      def array(self):
          return self._array
  
      def _get_probes(self, key):
          random = Random(key).random
          return (int(random() * self._num_bits)
                  for _ in range(self._num_probes))
  
      def update(self, keys):
          """Add keys to the current filter
          :param keys: iterable set of keys
          """
          for key in keys:
              for i in self._get_probes(key):
                  self._array[i // 8] |= 2 ** (i % 8)
  
      def __contains__(self, key):
          return all(self._array[i // 8] & (2 ** (i % 8))
                     for i in self._get_probes(key))
  
new_contents: # Copyright (c) 2015 OpenStack Foundation.
  # 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.
  from random import Random
  
  
  class BloomFilter(object):
      def __init__(self, num_bytes, num_probes, iterable=()):
          """Bloom filter implementation
  
          Example: Check if number in set
  
          >>> bf = BloomFilter(8, 2, (123, 321, 213, 3123))
          >>> 123 in bf
          True
          >>> 456 in bf
          False
  
          :param num_bytes: Number of bytes in the filter
          :type num_bytes: int
          :param num_probes: Number of bloom filter probes
          :type num_probes: int
          :param iterable: Iterable set of items to create the filter from
          """
          self._array = bytearray(num_bytes)
          self._num_probes = num_probes
          self._num_bits = num_bytes * 8
          self.update(iterable)
  
      @property
      def array(self):
          return self._array
  
      def _get_probes(self, key):
          random = Random(key).random
          return (int(random() * self._num_bits)
                  for _probe in range(self._num_probes))
  
      def update(self, keys):
          """Add keys to the current filter
          :param keys: iterable set of keys
          """
          for key in keys:
              for i in self._get_probes(key):
                  self._array[i // 8] |= 2 ** (i % 8)
  
      def __contains__(self, key):
          return all(self._array[i // 8] & (2 ** (i % 8))
                     for i in self._get_probes(key))
  
subject: Rename anonymous variable _