code: def _clean_accents(self, text):
          
          accents = {
              'ὲέἐἑἒἓἕἔ': 'ε',
              'ὺύὑὐὒὓὔὕ': 'υ',
              'ὸόὀὁὂὃὄὅ': 'ο',
              'ὶίἰἱἲἳἵἴ': 'ι',
              'ὰάἁἀἂἃἅἄᾳᾂᾃ': 'α',
              'ὴήἠἡἢἣἥἤἧἦῆῄῂῇῃᾓᾒᾗᾖᾑᾐ': 'η',
              'ὼώὠὡὢὣὤὥὦὧῶῲῴῷῳᾧᾦᾢᾣᾡᾠ': 'ω',
              'ἶἷ': 'ῖ',
              'ἆἇᾷᾆᾇ': 'ᾶ',
              'ὖὗ': 'ῦ',
              }
          text = self._clean_text(text)
          for char in text:
              for key in accents.keys():
                  if char in key:
                      text = text.replace(char, accents.get(key))
                  else:
                      pass
          return text
docs: Remove most accent marks.
  
          Note that the circumflexes over alphas and iotas in the text since
          they determine vocalic quantity.
          :param text: raw text
          :return: clean text with minimum accent marks
          :rtype : string