import abc
  
  class abstract_instrument(object):
      __metaclass__ = abc.ABCMeta
  
      @abc.abstractmethod
      def __init__(self, adress, vtype, channel):
          """Build the class"""
          return
  
      @abc.abstractmethod
      def model(self):
          """return the instrument model"""
          return
  
      @abc.abstractmethod
      def connect(self):
          """Create a connection with the instrument"""
          return
  
      @abc.abstractmethod
      def disconnect(self):
          """Disconnect the instrument"""
          return
  
      @abc.abstractmethod
      def configure(self):
          """Configure the instrument"""
          return
  
      @abc.abstractmethod
      def read(self):
          """read the buffer"""
          return
  
      @abc.abstractmethod
      def send(self):
          """send a command"""
          return
  
      @abc.abstractmethod
      def getValue(self):
          """return the value of measurment"""
          return