old_contents: # Copyright 2016 UnitedStack, Inc.
  # 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.
  
  import pcap
  from steth.agent.common import log
  from steth.agent.common import utils
  from steth.agent.common import constants
  
  LOG = log.get_logger()
  
  
  class PcapDriver(object):
  
      def setup_listener(self, iface, filter, timeout=2):
          listener = pcap.pcap(iface, timeout_ms=timeout * 1000)
          listener.setfilter(filter)
          return listener
  
      def setup_listener_on_comp(self, port_id, filter):
          tap_device = utils.get_vif_name(constants.TAP_DEVICE_PREFIX, port_id)
          qvb_device = utils.get_vif_name(constants.QVB_DEVICE_PREFIX, port_id)
          qbr_device = utils.get_vif_name(constants.QBR_DEVICE_PREFIX, port_id)
          qvo_device = utils.get_vif_name(constants.QVO_DEVICE_PREFIX, port_id)
          vif_devices = [tap_device, qvb_device, qbr_device, qvo_device]
          return map(lambda vif: self.setup_listener(vif, filter), vif_devices)
  
      def set_nonblock(self, listener):
          listener.setnonblock(True)
  
new_contents: # Copyright 2016 UnitedStack, Inc.
  # 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.
  
  import pcapy
  from steth.agent.common import log
  from steth.agent.common import utils
  from steth.agent.common import constants
  
  LOG = log.get_logger()
  
  
  class PcapDriver(object):
  
      def setup_listener(self, iface, filter, timeout=2):
          listener = pcapy.pcapy(iface, timeout_ms=timeout * 1000)
          listener.setfilter(filter)
          return listener
  
      def setup_listener_on_comp(self, port_id, filter):
          tap_device = utils.get_vif_name(constants.TAP_DEVICE_PREFIX, port_id)
          qvb_device = utils.get_vif_name(constants.QVB_DEVICE_PREFIX, port_id)
          qbr_device = utils.get_vif_name(constants.QBR_DEVICE_PREFIX, port_id)
          qvo_device = utils.get_vif_name(constants.QVO_DEVICE_PREFIX, port_id)
          vif_devices = [tap_device, qvb_device, qbr_device, qvo_device]
          return map(lambda vif: self.setup_listener(vif, filter), vif_devices)
  
      def set_nonblock(self, listener):
          listener.setnonblock(True)
  
subject: Change "pcap" to "pcapy"