@staticmethod
def words_list(text):
    ' get all words in a list\n        return the list of words [a-zA-Z_].\n        '
    return re.findall('[a-zA-Z]+', text)
get all words in a list
return the list of words [a-zA-Z_].
@staticmethod
def words_list(text):
    ' get all words in a list\n        return the list of words [a-zA-Z_].\n        '
    return re.findall('[a-zA-Z]+', text)