

class ControlSystem(object):
    """ Define a control system to be used with a device.

    It uses channel access to comunicate over the network with
    the hardware.
    """
    def __init__(self):
        raise NotImplementedError()

    def get(self, pv):
        """ Get the value of the given pv.

        Args:
            pv(string): The Pv to get the value of.

        Returns:
            Number: The numeric value of the pv.
        """
        raise NotImplementedError()

    def put(self, pv, value):
        """ Put the value of a given pv.

        Args:
            pv(string): The string to put the value for.
            value(Number): The value to be set.
        """
        raise NotImplementedError()


class NullControlSystem(ControlSystem):
    """ Dummy control system to set the value of a pv."""
    def __init__(self):
        pass

    def get(self, pv):
        """ Get the value of the given pv.

        Args:
            pv(string): The Pv to get the value of.

        Returns:
            Number: The numeric value of the pv.
        """
        pass

    def put(self, pv, value):
        """ Put the value of a given pv.

        Args:
            pv(string): The string to put the value for.
            value(Number): The value to be set.
        """
        pass



class ControlSystem(object):
    """ Define a control system to be used with a device.

    It uses channel access to comunicate over the network with
    the hardware.
    """
    def __init__(self):
        raise NotImplementedError()

    def get(self, pv):
        """ Get the value of the given pv.

        Args:
            pv(string): The Pv to get the value of.

        Returns:
            Number: The numeric value of the pv.
        """
        raise NotImplementedError()

    def put(self, pv, value):
        """ Put the value of a given pv.

        Args:
            pv(string): The string to put the value for.
            value(Number): The value to be set.
        """
        raise NotImplementedError()

Remove the null control system
Remove the null control system

  
  
  class ControlSystem(object):
      """ Define a control system to be used with a device.
  
      It uses channel access to comunicate over the network with
      the hardware.
      """
      def __init__(self):
          raise NotImplementedError()
  
      def get(self, pv):
          """ Get the value of the given pv.
  
          Args:
              pv(string): The Pv to get the value of.
  
          Returns:
              Number: The numeric value of the pv.
          """
          raise NotImplementedError()
  
      def put(self, pv, value):
          """ Put the value of a given pv.
  
          Args:
              pv(string): The string to put the value for.
              value(Number): The value to be set.
          """
          raise NotImplementedError()
  
- 
- class NullControlSystem(ControlSystem):
-     """ Dummy control system to set the value of a pv."""
-     def __init__(self):
-         pass
- 
-     def get(self, pv):
-         """ Get the value of the given pv.
- 
-         Args:
-             pv(string): The Pv to get the value of.
- 
-         Returns:
-             Number: The numeric value of the pv.
-         """
-         pass
- 
-     def put(self, pv, value):
-         """ Put the value of a given pv.
- 
-         Args:
-             pv(string): The string to put the value for.
-             value(Number): The value to be set.
-         """
-         pass
- 
Remove the null control system
## Code Before:


class ControlSystem(object):
    """ Define a control system to be used with a device.

    It uses channel access to comunicate over the network with
    the hardware.
    """
    def __init__(self):
        raise NotImplementedError()

    def get(self, pv):
        """ Get the value of the given pv.

        Args:
            pv(string): The Pv to get the value of.

        Returns:
            Number: The numeric value of the pv.
        """
        raise NotImplementedError()

    def put(self, pv, value):
        """ Put the value of a given pv.

        Args:
            pv(string): The string to put the value for.
            value(Number): The value to be set.
        """
        raise NotImplementedError()


class NullControlSystem(ControlSystem):
    """ Dummy control system to set the value of a pv."""
    def __init__(self):
        pass

    def get(self, pv):
        """ Get the value of the given pv.

        Args:
            pv(string): The Pv to get the value of.

        Returns:
            Number: The numeric value of the pv.
        """
        pass

    def put(self, pv, value):
        """ Put the value of a given pv.

        Args:
            pv(string): The string to put the value for.
            value(Number): The value to be set.
        """
        pass

## Instruction:
Remove the null control system
## Code After:


class ControlSystem(object):
    """ Define a control system to be used with a device.

    It uses channel access to comunicate over the network with
    the hardware.
    """
    def __init__(self):
        raise NotImplementedError()

    def get(self, pv):
        """ Get the value of the given pv.

        Args:
            pv(string): The Pv to get the value of.

        Returns:
            Number: The numeric value of the pv.
        """
        raise NotImplementedError()

    def put(self, pv, value):
        """ Put the value of a given pv.

        Args:
            pv(string): The string to put the value for.
            value(Number): The value to be set.
        """
        raise NotImplementedError()
