old_contents: import sys
  import os
  sys.path.append(os.path.dirname(__file__) + "/../../")
  
  from state import state
  from state.stateEnum import StateEnum
  from helpers import configHelper
  from helpers import processorHelper
  
  class Learn:
  
      current_word = 0
  
      def __init__(self, level_number):
          self.number = level_number
          self.words = configHelper.get_level_config('learn', self.number)['words']
          self.output = processorHelper.get_output_processor()
          print("Nivel " + str(self.number) + " de aprendizaje")
          self._print_word()
  
      def process_input(self, input_value):
  
          if input_value == "right":
              self.current_word += 1
              self._verify_overflow()
              self._print_word()
  
          if input_value == "left":
              self.current_word -= 1
              self._verify_overflow()
              self._print_word()
  
          if input_value == "back":
              print("Regresando a " + StateEnum.MENU.realName)
              state.set_state(StateEnum.MENU.key)
  
      def _verify_overflow(self):
          pass
      
      def _print_word(self):
          word = self.words[self.current_word]
          print(word)
          self.output.write(word.upper())
new_contents: import sys
  import os
  sys.path.append(os.path.dirname(__file__) + "/../../")
  
  from state import state
  from state.stateEnum import StateEnum
  from helpers import configHelper
  from helpers import processorHelper
  
  class Learn:
  
      current_word = 0
  
      def __init__(self, level_number):
          self.number = level_number
          self.words = configHelper.get_level_config('learn', self.number)['words']
          self.output = processorHelper.get_output_processor()
          print("Nivel " + str(self.number) + " de aprendizaje")
          self._print_word()
  
      def process_input(self, input_value):
  
          if input_value == "right":
              self.current_word += 1
              if not self._verify_overflow():
                  self._print_word()
              else:
                  print("Se termino el nivel " + str(self.number) + " de aprendizaje. Saliendo al menu principal ...")
                  state.set_state(StateEnum.MENU.key)
  
          if input_value == "left":
              self.current_word -= 1
              if not self._verify_overflow():
                  self._print_word()
              else:
                  self.current_word = 0
  
          if input_value == "back":
              print("Regresando a " + StateEnum.MENU.realName)
              state.set_state(StateEnum.MENU.key)
  
      def _verify_overflow(self):
          return self.current_word == -1 or self.current_word == len(self.words)
      
      def _print_word(self):
          word = self.words[self.current_word]
          print(word)
          self.output.write(word.upper())
subject: Verify overflow in words array into the learn module