code: def _to_python(input_string):
      ''' a helper method to convert camelcase to python'''
      python_string = ''
      for i in range(len(input_string)):
          if not python_string:
              python_string += input_string[i].lower()
          elif input_string[i].isupper():
              python_string += '_%s' % input_string[i].lower()
          else:
              python_string += input_string[i]
      return python_strinf _to_python(input_string):
      ''' a helper method to convert camelcase to python'''
      python_string = ''
      for i in range(len(input_string)):
          if not python_string:
              python_string += input_string[i].lower()
          elif input_string[i].isupper():
              python_string += '_%s' % input_string[i].lower()
          else:
              python_string += input_string[i]
      return python_string
docs: a helper method to convert camelcase to python