code: def execute_lines(self, lines):
          
          for line in lines.splitlines():
              stripped_line = line.strip()
              if stripped_line.startswith('#'):
                  continue
              self.write(line+os.linesep, flush=True)
              self.execute_command(line+"\n")
              self.flush()
docs: Execute a set of lines as multiple command
          lines: multiple lines of text to be executed as single commands