code: def poke_8(library, session, address, data):
      
      return library.viPoke8(session, address, data)
docs: Write an 8-bit value from the specified address.
  
      Corresponds to viPoke8 function of the VISA library.
  
      :param library: the visa library wrapped by ctypes.
      :param session: Unique logical identifier to a session.
      :param address: Source address to read the value.
      :param data: value to be written to the bus.
      :return: Data read from bus.
      :return: return value of the library call.
      :rtype: :class:`pyvisa.constants.StatusCode`