code: def execute_code(self, lines, current_client=True, clear_variables=False):
          
          sw = self.get_current_shellwidget()
          if sw is not None:
              if sw._reading:
                  pass
              else:
                  if not current_client:
                      # Clear console and reset namespace for
                      # dedicated clients
                      # See issue 5748
                      try:
                          sw.sig_prompt_ready.disconnect()
                      except TypeError:
                          pass
                      sw.reset_namespace(warning=False)
                  elif current_client and clear_variables:
                      sw.reset_namespace(warning=False)
                  # Needed to handle an error when kernel_client is none
                  # See issue 6308
                  try:
                      sw.execute(to_text_string(lines))
                  except AttributeError:
                      pass
              self.activateWindow()
              self.get_current_client().get_control().setFocus()
docs: Execute code instructions.