code: def add_transition_list (self, list_input_symbols, state, action=None, next_state=None):
  
          '''This adds the same transition for a list of input symbols.
          You can pass a list or a string. Note that it is handy to use
          string.digits, string.whitespace, string.letters, etc. to add
          transitions that match character classes.
  
          The action may be set to None in which case the process() method will
          ignore the action and only set the next_state. The next_state may be
          set to None in which case the current state will be unchanged. '''
  
          if next_state is None:
              next_state = state
          for input_symbol in list_input_symbols:
              self.add_transition (input_symbol, state, action, next_statef add_transition_list (self, list_input_symbols, state, action=None, next_state=None):
  
          '''This adds the same transition for a list of input symbols.
          You can pass a list or a string. Note that it is handy to use
          string.digits, string.whitespace, string.letters, etc. to add
          transitions that match character classes.
  
          The action may be set to None in which case the process() method will
          ignore the action and only set the next_state. The next_state may be
          set to None in which case the current state will be unchanged. '''
  
          if next_state is None:
              next_state = state
          for input_symbol in list_input_symbols:
              self.add_transition (input_symbol, state, action, next_state)
docs: This adds the same transition for a list of input symbols.
          You can pass a list or a string. Note that it is handy to use
          string.digits, string.whitespace, string.letters, etc. to add
          transitions that match character classes.
  
          The action may be set to None in which case the process() method will
          ignore the action and only set the next_state. The next_state may be
          set to None in which case the current state will be unchanged.