# Generated from persian.sbl by Snowball 3.1.1 - https://snowballstem.org/ from .basestemmer import BaseStemmer from .among import Among class PersianStemmer(BaseStemmer): ''' This class implements the stemming algorithm defined by a snowball script. Generated from persian.sbl by Snowball 3.1.1 - https://snowballstem.org/ ''' I_p1 = 0 B_remove_verb_person_endings = False B_saw_present_prefix = False def __r_Normalize_Characters(self): while True: v_1 = self.cursor try: self.bra = self.cursor among_var = self.find_among(PersianStemmer.a_0) self.ket = self.cursor if among_var == 1: self.slice_from("\u06A9") elif among_var == 2: self.slice_from("\u06CC") elif among_var == 3: self.slice_from("\u0647") elif among_var == 4: self.slice_from("\u0627") elif among_var == 5: self.slice_from("\u0648") elif among_var == 6: self.slice_del() else: if self.cursor >= self.limit: raise lab0() self.cursor += 1 continue except lab0: pass self.cursor = v_1 break return True def __r_Prefixes(self): self.bra = self.cursor among_var = self.find_among(PersianStemmer.a_1) if among_var == 0: return False self.ket = self.cursor if among_var == 1: if self.cursor + 2 > self.limit: return False self.cursor += 2 self.B_saw_present_prefix = True else: if self.cursor + 2 > self.limit: return False self.cursor += 2 self.slice_del() self.B_saw_present_prefix = True return True def __r_Delete_ZWNJ(self): while True: v_1 = self.cursor try: while True: v_2 = self.cursor try: self.bra = self.cursor if self.cursor == self.limit or self.current[self.cursor] != "\u200C": raise lab1() self.cursor += 1 self.ket = self.cursor self.slice_del() self.cursor = v_2 break except lab1: pass self.cursor = v_2 if self.cursor >= self.limit: raise lab0() self.cursor += 1 continue except lab0: pass self.cursor = v_1 break return True def __r_R1(self): return self.I_p1 <= self.cursor def __r_Protect_Lexical_AN(self): v_1 = self.limit - self.cursor try: if not self.__r_AN_Exception(): raise lab0() return False except lab0: pass self.cursor = self.limit - v_1 v_2 = self.limit - self.cursor try: if self.find_among_b(PersianStemmer.a_2) == 0: raise lab0() return False except lab0: pass self.cursor = self.limit - v_2 return True def __r_AN_Exception(self): if self.find_among_b(PersianStemmer.a_3) == 0: return False if self.cursor > self.limit_backward: return False return True def __r_Irregular_Noun(self): self.ket = self.cursor among_var = self.find_among_b(PersianStemmer.a_4) if among_var == 0: return False self.bra = self.cursor self.slice_from(PersianStemmer.as_4[among_var - 1]) return True def __r_Stem_Noun_or_Adjective(self): while True: v_1 = self.limit - self.cursor try: if not self.__r_Irregular_Noun(): raise lab0() break except lab0: pass self.cursor = self.limit - v_1 if self.cursor < self.I_p1: return False v_3 = self.limit_backward self.limit_backward = self.I_p1 self.ket = self.cursor among_var = self.find_among_b(PersianStemmer.a_5) if among_var == 0: self.limit_backward = v_3 return False self.bra = self.cursor if among_var == 1: self.slice_del() else: if self.cursor <= self.limit_backward: self.limit_backward = v_3 return False self.slice_del() self.limit_backward = v_3 break return True def __r_Stem_Verb(self): while True: v_1 = self.limit - self.cursor try: self.ket = self.cursor if self.find_among_b(PersianStemmer.a_6) == 0: raise lab0() self.bra = self.cursor if not self.__r_R1(): raise lab0() self.slice_del() break except lab0: pass self.cursor = self.limit - v_1 self.ket = self.cursor among_var = self.find_among_b(PersianStemmer.a_7) if among_var == 0: return False self.bra = self.cursor if among_var == 1: if not self.B_remove_verb_person_endings: return False if not self.__r_R1(): return False self.slice_del() elif among_var == 2: self.slice_from("\u0631\u0641\u062A") elif among_var == 3: if not self.__r_R1(): return False self.slice_del() self.B_remove_verb_person_endings = True elif among_var == 4: if self.cursor <= self.limit_backward: return False self.slice_from("\u062F") self.B_remove_verb_person_endings = True else: if self.cursor <= self.limit_backward: return False self.slice_from("\u062A") self.B_remove_verb_person_endings = True break return True def _stem(self): self.B_saw_present_prefix = False v_1 = self.cursor self.__r_Normalize_Characters() self.cursor = v_1 v_2 = self.cursor self.__r_Prefixes() self.cursor = v_2 v_3 = self.cursor self.__r_Delete_ZWNJ() self.cursor = v_3 self.I_p1 = self.limit v_4 = self.cursor try: if self.cursor + 3 > self.limit: raise lab0() self.cursor += 3 self.I_p1 = self.cursor except lab0: pass self.cursor = v_4 self.limit_backward = self.cursor self.cursor = self.limit while True: v_5 = self.limit - self.cursor try: v_6 = self.limit - self.cursor self.B_remove_verb_person_endings = False try: if not self.B_saw_present_prefix: raise lab1() self.B_remove_verb_person_endings = True except lab1: pass if not self.__r_Protect_Lexical_AN(): raise lab0() while True: v_7 = self.limit - self.cursor try: if not self.__r_Stem_Noun_or_Adjective(): raise lab1() break except lab1: pass self.cursor = self.limit - v_7 if not self.__r_Stem_Verb(): raise lab0() break self.cursor = self.limit - v_6 continue except lab0: pass self.cursor = self.limit - v_5 break self.cursor = self.limit_backward return True a_0 = [ Among("", -1, 7), Among(" ", 0, 6), Among("\u0623", 0, 4), Among("\u0624", 0, 5), Among("\u0625", 0, 4), Among("\u0626", 0, 2), Among("\u0629", 0, 3), Among("\u0643", 0, 1), Among("\u064A", 0, 2), Among("\u06C1", 0, 3), Among("\u200D", 0, 6) ] a_1 = [ Among("\u0645\u06CC\u200C", -1, 2), Among("\u0646\u0645\u06CC\u200C", -1, 1) ] a_2 = [ Among("\u0633\u062A\u0627\u0646", -1, -1), Among("\u0631\u0627\u0646", -1, -1), Among("\u0633\u0627\u0646", -1, -1), Among("\u0648\u0627\u0646", -1, -1) ] a_3 = [ Among("\u0622\u0630\u0631\u0628\u0627\u06CC\u062C\u0627\u0646", -1, 1), Among("\u0647\u0645\u062F\u0627\u0646", -1, 1), Among("\u062E\u0627\u0646\u062F\u0627\u0646", -1, 1), Among("\u0632\u0646\u062F\u0627\u0646", -1, 1), Among("\u0645\u06CC\u0632\u0627\u0646", -1, 1), Among("\u062F\u0631\u062E\u0634\u0627\u0646", -1, 1), Among("\u0622\u062A\u0634\u0641\u0634\u0627\u0646", -1, 1), Among("\u0646\u0634\u0627\u0646", -1, 1), Among("\u06A9\u0647\u06A9\u0634\u0627\u0646", -1, 1), Among("\u0627\u06CC\u0634\u0627\u0646", -1, 1), Among("\u067E\u0631\u06CC\u0634\u0627\u0646", -1, 1), Among("\u0633\u0644\u0637\u0627\u0646", -1, 1), Among("\u06AF\u06CC\u0644\u0627\u0646", -1, 1), Among("\u0633\u0627\u062E\u062A\u0645\u0627\u0646", -1, 1), Among("\u0631\u0645\u0627\u0646", -1, 1), Among("\u062F\u0631\u0645\u0627\u0646", 14, 1), Among("\u0642\u0647\u0631\u0645\u0627\u0646", 14, 1), Among("\u06A9\u0631\u0645\u0627\u0646", 14, 1), Among("\u0633\u0627\u0632\u0645\u0627\u0646", -1, 1), Among("\u0647\u0645\u0632\u0645\u0627\u0646", -1, 1), Among("\u0622\u0633\u0645\u0627\u0646", -1, 1), Among("\u0622\u0644\u0645\u0627\u0646", -1, 1), Among("\u0645\u0633\u0644\u0645\u0627\u0646", -1, 1), Among("\u0627\u06CC\u0645\u0627\u0646", -1, 1), Among("\u0633\u0644\u06CC\u0645\u0627\u0646", -1, 1), Among("\u067E\u06CC\u0645\u0627\u0646", -1, 1), Among("\u0644\u0628\u0646\u0627\u0646", -1, 1), Among("\u06CC\u0648\u0646\u0627\u0646", -1, 1), Among("\u0627\u0635\u0641\u0647\u0627\u0646", -1, 1), Among("\u0627\u0645\u06A9\u0627\u0646", -1, 1), Among("\u067E\u0627\u06CC\u0627\u0646", -1, 1), Among("\u0628\u06CC\u0627\u0646", -1, 1), Among("\u062C\u0631\u06CC\u0627\u0646", -1, 1) ] a_4 = [ Among("\u0627\u0633\u0627\u062A\u06CC\u062F", -1, 2), Among("\u0627\u062E\u0628\u0627\u0631", -1, 1) ] as_4 = ("\u062E\u0628\u0631", "\u0627\u0633\u062A\u0627\u062F") a_5 = [ Among("\u0647\u0627", -1, 1), Among("\u0627\u062A", -1, 1), Among("\u06CC\u062A", -1, 1), Among("\u0645\u0646\u062F", -1, 1), Among("\u0648\u0627\u0631", -1, 1), Among("\u06AF\u0627\u0631", -1, 1), Among("\u062A\u0631", -1, 2), Among("\u0627\u0634", -1, 1), Among("\u0627\u0645", -1, 1), Among("\u0627\u0646", -1, 1), Among("\u0628\u0627\u0646", 9, 1), Among("\u06AF\u0627\u0646", 9, 1), Among("\u06CC\u0627\u0646", 9, 1), Among("\u06CC\u0646", -1, 1), Among("\u062A\u0631\u06CC\u0646", 13, 1), Among("\u06AF\u0627\u0647", -1, 1), Among("\u0627\u0646\u0647", -1, 1), Among("\u0646\u0627\u06A9", -1, 1), Among("\u0647\u0627\u06CC", -1, 1), Among("\u0627\u0646\u06CC", -1, 1), Among("\u06AF\u06CC", -1, 1), Among("\u06CC\u06CC", -1, 1) ] a_6 = [ Among("\u0627\u0633\u062A", -1, 1), Among("\u0627\u0646\u062F", -1, 1), Among("\u06CC\u062F", -1, 1), Among("\u0627\u06CC\u062F", 2, 1), Among("\u0627\u0633", -1, 1), Among("\u06CC\u0645", -1, 1), Among("\u0627\u06CC\u0645", 5, 1), Among("\u0627\u06CC", -1, 1) ] a_7 = [ Among("\u062F", -1, 1), Among("\u0627\u0646\u062F", 0, 1), Among("\u0631\u0641\u062A\u0627\u0646\u062F", 1, 2), Among("\u06CC\u062F", 0, 1), Among("\u0631\u0641\u062A\u06CC\u062F", 3, 2), Among("\u0645", -1, 1), Among("\u0627\u0645", 5, 1), Among("\u0631\u0641\u062A\u0645", 5, 2), Among("\u06CC\u0645", 5, 1), Among("\u0631\u0641\u062A\u06CC\u0645", 8, 2), Among("\u0627\u0646", -1, 3), Among("\u062A\u0647", -1, 5), Among("\u062F\u0647", -1, 4), Among("\u0646\u062F\u0647", 12, 3), Among("\u0631\u0641\u062A\u06CC", -1, 2) ] class lab0(BaseException): pass class lab1(BaseException): pass