code: def read(library, session, count):
      
      buffer = create_string_buffer(count)
      return_count = ViUInt32()
      ret = library.viRead(session, buffer, count, byref(return_count))
      return buffer.raw[:return_count.value], ret
docs: Reads data from device or interface synchronously.
  
      Corresponds to viRead function of the VISA library.
  
      :param library: the visa library wrapped by ctypes.
      :param session: Unique logical identifier to a session.
      :param count: Number of bytes to be read.
      :return: data read, return value of the library call.
      :rtype: bytes, :class:`pyvisa.constants.StatusCode`