How to use the snowballstemmer.english_stemmer.lab1 function in snowballstemmer

def r_Step_1c(self):
        # (, line 93
        # [, line 94
        self.ket = self.cursor
        # or, line 94
        try:
            v_1 = self.limit - self.cursor
            try:
                # literal, line 94
                if not self.eq_s_b(1, u"y"):
                    raise lab1()
                raise lab0()
            except lab1: pass
            self.cursor = self.limit - v_1
            # literal, line 94
            if not self.eq_s_b(1, u"Y"):
                return False
        except lab0: pass
        # ], line 94
        self.bra = self.cursor
        if not self.out_grouping_b(EnglishStemmer.g_v, 97, 121):
            return False
        # not, line 95
        v_2 = self.limit - self.cursor
        try:
            # atlimit, line 95
            if self.cursor > self.limit_backward:

if not self.eq_s(1, u"Y"):
                                        raise lab4()
                                    # ], line 203
                                    self.ket = self.cursor
                                    self.cursor = v_2
                                    raise lab3()
                                except lab4: pass
                                self.cursor = v_2
                                if self.cursor >= self.limit:
                                    raise lab2()
                                self.cursor += 1
                        except lab3: pass
                        # <-, line 203
                        if not self.slice_from(u"y"):
                            return False
                        raise lab1()
                    except lab2: pass
                    self.cursor = v_1
                    raise lab0()
                except lab1: pass
        except lab0: pass
        return True

def r_shortv(self):
        # (, line 49
        # or, line 51
        try:
            v_1 = self.limit - self.cursor
            try:
                # (, line 50
                if not self.out_grouping_b(EnglishStemmer.g_v_WXY, 89, 121):
                    raise lab1()
                if not self.in_grouping_b(EnglishStemmer.g_v, 97, 121):
                    raise lab1()
                if not self.out_grouping_b(EnglishStemmer.g_v, 97, 121):
                    raise lab1()
                raise lab0()
            except lab1: pass
            self.cursor = self.limit - v_1
            # (, line 52
            if not self.out_grouping_b(EnglishStemmer.g_v, 97, 121):
                return False
            if not self.in_grouping_b(EnglishStemmer.g_v, 97, 121):
                return False
            # atlimit, line 52
            if self.cursor > self.limit_backward:
                return False
        except lab0: pass

elif among_var == 2:
            # (, line 68
            # or, line 68
            try:
                v_2 = self.limit - self.cursor
                try:
                    # (, line 68
                    # hop, line 68
                    c = self.cursor - 2
                    if self.limit_backward > c or c > self.limit:
                        raise lab2()
                    self.cursor = c
                    # <-, line 68
                    if not self.slice_from(u"i"):
                        return False
                    raise lab1()
                except lab2: pass
                self.cursor = self.limit - v_2
                # <-, line 68
                if not self.slice_from(u"ie"):
                    return False
            except lab1: pass
        elif among_var == 3:
            # (, line 69
            # next, line 69
            if self.cursor <= self.limit_backward:
                return False
            self.cursor -= 1
            # gopast, line 69
            try:
                while True:
                    try:

# (, line 68
                    # hop, line 68
                    c = self.cursor - 2
                    if self.limit_backward > c or c > self.limit:
                        raise lab2()
                    self.cursor = c
                    # <-, line 68
                    if not self.slice_from(u"i"):
                        return False
                    raise lab1()
                except lab2: pass
                self.cursor = self.limit - v_2
                # <-, line 68
                if not self.slice_from(u"ie"):
                    return False
            except lab1: pass
        elif among_var == 3:
            # (, line 69
            # next, line 69
            if self.cursor <= self.limit_backward:
                return False
            self.cursor -= 1
            # gopast, line 69
            try:
                while True:
                    try:
                        if not self.in_grouping_b(EnglishStemmer.g_v, 97, 121):
                            raise lab4()
                        raise lab3()
                    except lab4: pass
                    if self.cursor <= self.limit_backward:
                        return False

return False
        elif among_var == 1:
            # (, line 144
            # delete, line 144
            if not self.slice_del():
                return False

        elif among_var == 2:
            # (, line 145
            # or, line 145
            try:
                v_1 = self.limit - self.cursor
                try:
                    # literal, line 145
                    if not self.eq_s_b(1, u"s"):
                        raise lab1()
                    raise lab0()
                except lab1: pass
                self.cursor = self.limit - v_1
                # literal, line 145
                if not self.eq_s_b(1, u"t"):
                    return False
            except lab0: pass
            # delete, line 145
            if not self.slice_del():
                return False

        return True

def r_shortv(self):
        # (, line 49
        # or, line 51
        try:
            v_1 = self.limit - self.cursor
            try:
                # (, line 50
                if not self.out_grouping_b(EnglishStemmer.g_v_WXY, 89, 121):
                    raise lab1()
                if not self.in_grouping_b(EnglishStemmer.g_v, 97, 121):
                    raise lab1()
                if not self.out_grouping_b(EnglishStemmer.g_v, 97, 121):
                    raise lab1()
                raise lab0()
            except lab1: pass
            self.cursor = self.limit - v_1
            # (, line 52
            if not self.out_grouping_b(EnglishStemmer.g_v, 97, 121):
                return False
            if not self.in_grouping_b(EnglishStemmer.g_v, 97, 121):
                return False
            # atlimit, line 52
            if self.cursor > self.limit_backward:
                return False
        except lab0: pass
        return True

def r_mark_regions(self):
        # (, line 32
        self.I_p1 = self.limit;
        self.I_p2 = self.limit;
        # do, line 35
        v_1 = self.cursor
        try:
            # (, line 35
            # or, line 41
            try:
                v_2 = self.cursor
                try:
                    # among, line 36
                    if self.find_among(EnglishStemmer.a_0, 3) == 0:
                        raise lab2()
                    raise lab1()
                except lab2: pass
                self.cursor = v_2
                # (, line 41
                # gopast, line 41
                try:
                    while True:
                        try:
                            if not self.in_grouping(EnglishStemmer.g_v, 97, 121):
                                raise lab4()
                            raise lab3()
                        except lab4: pass
                        if self.cursor >= self.limit:
                            raise lab0()
                        self.cursor += 1
                except lab3: pass
                # gopast, line 41