code: def update_nonce(input_params):
          '''
          Static method to return a copy of the input dictionary with an
          additional unique nonce
          :param input: an input dictionary that may be empty
          :type input: dict
          :returns an extended copy of the input with an additional nonce field
  
          The input dictionary is updated with a nonce only if does not already
          have a non empty nonce
          '''
          input_cp = input_params.copy()
          if len(input_cp.get('nonce', '')) == 0:
              input_cp['nonce'] = str(Nonce())
          return input_cf update_nonce(input_params):
          '''
          Static method to return a copy of the input dictionary with an
          additional unique nonce
          :param input: an input dictionary that may be empty
          :type input: dict
          :returns an extended copy of the input with an additional nonce field
  
          The input dictionary is updated with a nonce only if does not already
          have a non empty nonce
          '''
          input_cp = input_params.copy()
          if len(input_cp.get('nonce', '')) == 0:
              input_cp['nonce'] = str(Nonce())
          return input_cp
docs: Static method to return a copy of the input dictionary with an
          additional unique nonce
          :param input: an input dictionary that may be empty
          :type input: dict
          :returns an extended copy of the input with an additional nonce field
  
          The input dictionary is updated with a nonce only if does not already
          have a non empty nonce