old_contents: from .base import PdoBase, Maps, Map, Variable
  
  import logging
  import collections
  import itertools
  import canopen
  
  logger = logging.getLogger(__name__)
  
  
  class PDO(PdoBase):
      """PDO Class for backwards compatibility
      :param rpdo: RPDO object holding the Receive PDO mappings
      :param tpdo: TPDO object holding the Transmit PDO mappings
      """
  
      def __init__(self, node, rpdo, tpdo):
          super(PDO, self).__init__(node)
          self.rx = rpdo.map
          self.tx = tpdo.map
  
          self.map = {}
          # the object 0x1A00 equals to key '1' so we remove 1 from the key
          for key, value in self.rx.items():
              self.map[0x1A00 + (key - 1)] = value
          for key, value in self.tx.items():
              self.map[0x1600 + (key - 1)] = value
  
  
  class RPDO(PdoBase):
      """PDO specialization for the Receive PDO enabling the transfer of data from the master to the node.
      Properties 0x1400 to 0x1403 | Mapping 0x1A00 to 0x1A03.
      :param object node: Parent node for this object."""
  
      def __init__(self, node):
          super(RPDO, self).__init__(node)
          self.map = Maps(0x1400, 0x1600, self, 0x200)
          logger.debug('RPDO Map as {0}'.format(len(self.map)))
  
      def stop(self):
          """Stop transmission of all RPDOs.
          :raise TypeError: Exception is thrown if the node associated with the PDO does not
          support this function"""
          if isinstance(self.node, canopen.RemoteNode):
              for pdo in self.map.values():
                  pdo.stop()
          else:
              raise TypeError('The node type does not support this function.')
  
  
  class TPDO(PdoBase):
      """PDO specialization for the Transmit PDO enabling the transfer of data from the node to the master.
      Properties 0x1800 to 0x1803 | Mapping 0x1600 to 0x1603."""
  
      def __init__(self, node):
          super(TPDO, self).__init__(node)
          self.map = Maps(0x1800, 0x1A00, self, 0x180)
          logger.debug('TPDO Map as {0}'.format(len(self.map)))
  
      def stop(self):
          """Stop transmission of all TPDOs.
          :raise TypeError: Exception is thrown if the node associated with the PDO does not
          support this function"""
          if isinstance(canopen.LocalNode, self.node):
              for pdo in self.map.values():
                  pdo.stop()
          else:
              raise TypeError('The node type does not support this function.')
  
new_contents: from .base import PdoBase, Maps, Map, Variable
  
  import logging
  import collections
  import itertools
  import canopen
  
  logger = logging.getLogger(__name__)
  
  
  class PDO(PdoBase):
      """PDO Class for backwards compatibility
      :param rpdo: RPDO object holding the Receive PDO mappings
      :param tpdo: TPDO object holding the Transmit PDO mappings
      """
  
      def __init__(self, node, rpdo, tpdo):
          super(PDO, self).__init__(node)
          self.rx = rpdo.map
          self.tx = tpdo.map
  
          self.map = {}
          # the object 0x1A00 equals to key '1' so we remove 1 from the key
          for key, value in self.rx.items():
              self.map[0x1A00 + (key - 1)] = value
          for key, value in self.tx.items():
              self.map[0x1600 + (key - 1)] = value
  
  
  class RPDO(PdoBase):
      """PDO specialization for the Receive PDO enabling the transfer of data from the master to the node.
      Properties 0x1400 to 0x1403 | Mapping 0x1600 to 0x1603.
      :param object node: Parent node for this object."""
  
      def __init__(self, node):
          super(RPDO, self).__init__(node)
          self.map = Maps(0x1400, 0x1600, self, 0x200)
          logger.debug('RPDO Map as {0}'.format(len(self.map)))
  
      def stop(self):
          """Stop transmission of all RPDOs.
          :raise TypeError: Exception is thrown if the node associated with the PDO does not
          support this function"""
          if isinstance(self.node, canopen.RemoteNode):
              for pdo in self.map.values():
                  pdo.stop()
          else:
              raise TypeError('The node type does not support this function.')
  
  
  class TPDO(PdoBase):
      """PDO specialization for the Transmit PDO enabling the transfer of data from the node to the master.
      Properties 0x1800 to 0x1803 | Mapping 0x1A00 to 0x1A03."""
  
      def __init__(self, node):
          super(TPDO, self).__init__(node)
          self.map = Maps(0x1800, 0x1A00, self, 0x180)
          logger.debug('TPDO Map as {0}'.format(len(self.map)))
  
      def stop(self):
          """Stop transmission of all TPDOs.
          :raise TypeError: Exception is thrown if the node associated with the PDO does not
          support this function"""
          if isinstance(canopen.LocalNode, self.node):
              for pdo in self.map.values():
                  pdo.stop()
          else:
              raise TypeError('The node type does not support this function.')
  
subject: comment fix