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How to use match_token method in Gherkin-python

Best Python code snippet using gherkin-python

jack_parser.py

Source:jack_parser.py

1import os2import xml.etree.ElementTree as ET3number_of_tab_spaces = 04def match_token(input_file, output_file, token_type, token_text_list, peek_only=False):5    line = peek_line(input_file)6    line_root = ET.ElementTree(ET.fromstring(line)).getroot()7    file_token_type = line_root.tag8    file_token_text = line_root.text.strip()9    if not file_token_type == token_type or (len(token_text_list) != 0 and file_token_text not in token_text_list):10        return False11    token_str = ET.tostring(line_root).decode()12    if not peek_only:13        print_token(output_file, token_str)14        input_file.readline()15    return True16def match_next_token(input_file, token_type, token_text_list):17    line = peek_next_line(input_file)18    line_root = ET.ElementTree(ET.fromstring(line)).getroot()19    file_token_type = line_root.tag20    file_token_text = line_root.text.strip()21    if not file_token_type == token_type or (len(token_text_list) != 0 and file_token_text not in token_text_list):22        return False23    return True24def peek_line(f):25    pos = f.tell()26    line = f.readline()27    f.seek(pos)28    return line29def peek_next_line(f):30    pos = f.tell()31    f.readline()32    line = f.readline()33    f.seek(pos)34    return line35def print_token(output_file, token):36    formatted_token = "{spaces}{token}\n".format(spaces="  " * number_of_tab_spaces, token=token)37    output_file.write(formatted_token)38def parse_directory(directory_to_tokenize):39    if os.path.isdir(directory_to_tokenize):40        for file in os.listdir(directory_to_tokenize):41            if file.endswith("_T.xml"):42                print("converting:  " + directory_to_tokenize + '\\' + file)43                parse_file(directory_to_tokenize + '\\' + file)44    else:45        print("no such directory {}".format(directory_to_tokenize))46def parse_file(file_to_tokenize_path_name):47    output_file_path_name = file_to_tokenize_path_name[:-6] + "_test.xml"48    with open(file_to_tokenize_path_name, 'r') as input_file:49        with open(output_file_path_name, 'w') as output_file:50            input_file.readline()51            global number_of_tab_spaces52            number_of_tab_spaces = 053            parse_class(input_file, output_file)54def parse_class(input_file, output_file):55    is_class = match_token(input_file, output_file, "keyword", ["class"], True)56    if is_class:57        print_token(output_file, "<class>")58        global number_of_tab_spaces59        number_of_tab_spaces += 160        match_token(input_file, output_file, "keyword", ["class"])61        parse_class_name(input_file, output_file)62        match_token(input_file, output_file, "symbol", ["{"])63        parse_class_var_dec(input_file, output_file)64        parse_sub_routine_dec(input_file, output_file)65        match_token(input_file, output_file, "symbol", "}")66        number_of_tab_spaces -= 167        print_token(output_file, "</class>")68def parse_class_var_dec(input_file, output_file):69    is_class_var_dec = match_token(input_file, output_file, "keyword", ["static", "field"], True)70    if is_class_var_dec:71        print_token(output_file, "<classVarDec>")72        global number_of_tab_spaces73        number_of_tab_spaces += 174        match_token(input_file, output_file, "keyword", ["static", "field"])75        parse_var(input_file, output_file)76        number_of_tab_spaces -= 177        print_token(output_file, "</classVarDec>")78        parse_class_var_dec(input_file, output_file)79def parse_type(input_file, output_file):80    if match_token(input_file, output_file, "keyword", ["int", "char", "boolean"]):81        return True82    elif match_token(input_file, output_file, "identifier", []):83        return True84    return False85def parse_sub_routine_dec(input_file, output_file):86    is_class_sub_routine_dec = match_token(input_file, output_file, "keyword", ["constructor", "function", "method"],87                                           True)88    if is_class_sub_routine_dec:89        print_token(output_file, "<subroutineDec>")90        global number_of_tab_spaces91        number_of_tab_spaces += 192        match_token(input_file, output_file, "keyword", ["constructor", "function", "method"])93        if not parse_type(input_file, output_file):94            match_token(input_file, output_file, "keyword", ["void"])95        parse_sub_routine_name(input_file, output_file)96        match_token(input_file, output_file, "symbol", ["("])97        parse_parameter_list(input_file, output_file)98        match_token(input_file, output_file, "symbol", [")"])99        parse_sub_routine_body(input_file, output_file)100        number_of_tab_spaces -= 1101        print_token(output_file, "</subroutineDec>")102        parse_sub_routine_dec(input_file, output_file)103def parse_parameter_list(input_file, output_file):104    print_token(output_file, "<parameterList>")105    global number_of_tab_spaces106    number_of_tab_spaces += 1107    parse_type(input_file, output_file)108    parse_var_name(input_file, output_file)109    while match_token(input_file, output_file, "symbol", [","]):110        parse_type(input_file, output_file)111        parse_var_name(input_file, output_file)112    number_of_tab_spaces -= 1113    print_token(output_file, "</parameterList>")114def parse_sub_routine_body(input_file, output_file):115    is_sub_routine_body = match_token(input_file, output_file, "symbol", ["{"], True)116    if is_sub_routine_body:117        print_token(output_file, "<subroutineBody>")118        global number_of_tab_spaces119        number_of_tab_spaces += 1120        match_token(input_file, output_file, "symbol", ["{"])121        parse_var_dec(input_file, output_file)122        parse_statements(input_file, output_file)123        match_token(input_file, output_file, "symbol", ["}"])124        number_of_tab_spaces -= 1125        print_token(output_file, "</subroutineBody>")126def parse_var_dec(input_file, output_file):127    is_var_dec = match_token(input_file, output_file, "keyword", ["var"], True)128    if is_var_dec:129        print_token(output_file, "<varDec>")130        global number_of_tab_spaces131        number_of_tab_spaces += 1132        match_token(input_file, output_file, "keyword", ["var"])133        parse_var(input_file, output_file)134        number_of_tab_spaces -= 1135        print_token(output_file, "</varDec>")136        parse_var_dec(input_file, output_file)137def parse_class_name(input_file, output_file):138    if match_token(input_file, output_file, "identifier", []):139        return True140    return False141def parse_sub_routine_name(input_file, output_file):142    if match_token(input_file, output_file, "identifier", []):143        return True144    return False145def parse_var_name(input_file, output_file):146    if match_token(input_file, output_file, "identifier", []):147        return True148    return False149def parse_statements(input_file, output_file):150    print_token(output_file, "<statements>")151    global number_of_tab_spaces152    number_of_tab_spaces += 1153    parse_statement(input_file, output_file)154    number_of_tab_spaces -= 1155    print_token(output_file, "</statements>")156def parse_statement(input_file, output_file):157    is_statement = parse_let_statement(input_file, output_file) \158        or parse_if_statement(input_file, output_file) \159        or parse_while_statement(input_file, output_file) \160        or parse_do_statement(input_file, output_file) \161        or parse_return_statement(input_file, output_file)162    if not is_statement:163        return164    parse_statement(input_file, output_file)165def parse_let_statement(input_file, output_file):166    is_let_statement = match_token(input_file, output_file, "keyword", ["let"], True)167    if is_let_statement:168        print_token(output_file, "<letStatement>")169        global number_of_tab_spaces170        number_of_tab_spaces += 1171        match_token(input_file, output_file, "keyword", ["let"])172        parse_var_name(input_file, output_file)173        if match_token(input_file, output_file, "symbol", ["["]):174            parse_expression(input_file, output_file)175            match_token(input_file, output_file, "symbol", ["]"])176        match_token(input_file, output_file, "symbol", ["="])177        parse_expression(input_file, output_file)178        match_token(input_file, output_file, "symbol", [";"])179        number_of_tab_spaces -= 1180        print_token(output_file, "</letStatement>")181        return True182    return False183def parse_if_statement(input_file, output_file):184    is_if_statement = match_token(input_file, output_file, "keyword", ["if"], True)185    if is_if_statement:186        print_token(output_file, "<ifStatement>")187        global number_of_tab_spaces188        number_of_tab_spaces += 1189        match_token(input_file, output_file, "keyword", ["if"])190        match_token(input_file, output_file, "symbol", ["("])191        parse_expression(input_file, output_file)192        match_token(input_file, output_file, "symbol", [")"])193        match_token(input_file, output_file, "symbol", ["{"])194        parse_statements(input_file, output_file)195        match_token(input_file, output_file, "symbol", ["}"])196        if match_token(input_file, output_file, "keyword", ["else"]):197            match_token(input_file, output_file, "symbol", ["{"])198            parse_statements(input_file, output_file)199            match_token(input_file, output_file, "symbol", ["}"])200        number_of_tab_spaces -= 1201        print_token(output_file, "</ifStatement>")202        return True203    return False204def parse_while_statement(input_file, output_file):205    is_while_statement = match_token(input_file, output_file, "keyword", ["while"], True)206    if is_while_statement:207        print_token(output_file, "<whileStatement>")208        global number_of_tab_spaces209        number_of_tab_spaces += 1210        match_token(input_file, output_file, "keyword", ["while"])211        match_token(input_file, output_file, "symbol", ["("])212        parse_expression(input_file, output_file)213        match_token(input_file, output_file, "symbol", [")"])214        match_token(input_file, output_file, "symbol", ["{"])215        parse_statements(input_file, output_file)216        match_token(input_file, output_file, "symbol", ["}"])217        number_of_tab_spaces -= 1218        print_token(output_file, "</whileStatement>")219        return True220    return False221def parse_do_statement(input_file, output_file):222    is_do_statement = match_token(input_file, output_file, "keyword", ["do"], True)223    if is_do_statement:224        print_token(output_file, "<doStatement>")225        global number_of_tab_spaces226        number_of_tab_spaces += 1227        match_token(input_file, output_file, "keyword", ["do"])228        parse_sub_routine_call(input_file, output_file)229        match_token(input_file, output_file, "symbol", [";"])230        number_of_tab_spaces -= 1231        print_token(output_file, "</doStatement>")232        return True233    return False234def parse_return_statement(input_file, output_file):235    is_return_statement = match_token(input_file, output_file, "keyword", ["return"], True)236    if is_return_statement:237        print_token(output_file, "<returnStatement>")238        global number_of_tab_spaces239        number_of_tab_spaces += 1240        match_token(input_file, output_file, "keyword", ["return"])241        if not match_token(input_file, output_file, "symbol", [";"]):242            parse_expression(input_file, output_file)243            match_token(input_file, output_file, "symbol", [";"])244        number_of_tab_spaces -= 1245        print_token(output_file, "</returnStatement>")246        return True247    return False248def parse_expression(input_file, output_file):249    print_token(output_file, "<expression>")250    global number_of_tab_spaces251    number_of_tab_spaces += 1252    parse_term(input_file, output_file)253    while parse_op(input_file, output_file):254        parse_term(input_file, output_file)255    number_of_tab_spaces -= 1256    print_token(output_file, "</expression>")257    return True258def parse_term(input_file, output_file):259    print_token(output_file, "<term>")260    global number_of_tab_spaces261    number_of_tab_spaces += 1262    is_parsed = match_token(input_file, output_file, "integerConstant", [])263    if not is_parsed:264        is_parsed = match_token(input_file, output_file, "stringConstant", [])265    if not is_parsed:266        is_parsed = parse_keyword_constant(input_file, output_file)267    if not is_parsed:268        if match_token(input_file, output_file, "identifier", [], True):269            if match_next_token(input_file, "symbol", ["("]) or match_next_token(input_file, "symbol", ["."]):270                is_parsed = parse_sub_routine_call(input_file, output_file)271            else:272                is_parsed = parse_term_var_name(input_file, output_file)273        else:274            is_parsed = False275    if not is_parsed and match_token(input_file, output_file, "symbol", ["("]):276        parse_expression(input_file, output_file)277        match_token(input_file, output_file, "symbol", [")"])278        is_parsed = True279    if not is_parsed and parse_unary_op(input_file, output_file):280        parse_term(input_file, output_file)281    number_of_tab_spaces -= 1282    print_token(output_file, "</term>")283    return True284def parse_sub_routine_call(input_file, output_file):285    if match_next_token(input_file, "symbol", ["("]):286        parse_sub_routine_name(input_file, output_file)287        match_token(input_file, output_file, "symbol", ["("])288        parse_expression_list(input_file, output_file)289        match_token(input_file, output_file, "symbol", [")"])290    elif match_next_token(input_file, "symbol", ["."]):291        match_token(input_file, output_file, "identifier", [])292        match_token(input_file, output_file, "symbol", ["."])293        parse_sub_routine_name(input_file, output_file)294        match_token(input_file, output_file, "symbol", ["("])295        parse_expression_list(input_file, output_file)296        match_token(input_file, output_file, "symbol", [")"])297    return True298def parse_expression_list(input_file, output_file):299    print_token(output_file, "<expressionList>")300    global number_of_tab_spaces301    number_of_tab_spaces += 1302    if not match_token(input_file, output_file, "symbol", [")"], True):303        parse_expression(input_file, output_file)304        while match_token(input_file, output_file, "symbol", [","]):305            parse_expression(input_file, output_file)306    number_of_tab_spaces -= 1307    print_token(output_file, "</expressionList>")308    return True309def parse_op(input_file, output_file):310    match_token(input_file, output_file, "symbol", ["&lt;"], True)311    return match_token(input_file, output_file, "symbol", ["+"]) \312           or match_token(input_file, output_file, "symbol", ["-"]) \313           or match_token(input_file, output_file, "symbol", ["*"]) \314           or match_token(input_file, output_file, "symbol", ["/"]) \315           or match_token(input_file, output_file, "symbol", ["&"]) \316           or match_token(input_file, output_file, "symbol", ["|"]) \317           or match_token(input_file, output_file, "symbol", ["<"]) \318           or match_token(input_file, output_file, "symbol", [">"]) \319           or match_token(input_file, output_file, "symbol", ["="])320def parse_unary_op(input_file, output_file):321    return match_token(input_file, output_file, "symbol", ["-"]) \322           or match_token(input_file, output_file, "symbol", ["~"])323def parse_keyword_constant(input_file, output_file):324    return match_token(input_file, output_file, "keyword", ["true"]) \325           or match_token(input_file, output_file, "keyword", ["false"]) \326           or match_token(input_file, output_file, "keyword", ["null"]) \327           or match_token(input_file, output_file, "keyword", ["this"])328def parse_term_var_name(input_file, output_file):329    if not parse_var_name(input_file, output_file):330        return False331    if match_token(input_file, output_file, "symbol", ["["]):332        parse_expression(input_file, output_file)333        match_token(input_file, output_file, "symbol", ["]"])334    return True335def parse_var(input_file, output_file):336    parse_type(input_file, output_file)337    parse_var_name(input_file, output_file)338    while match_token(input_file, output_file, "symbol", [","], True):339        match_token(input_file, output_file, "symbol", [","])340        parse_var_name(input_file, output_file)341    match_token(input_file, output_file, "symbol", [";"])...

compiler.py

Source:compiler.py

...127    def next_token(self):128        t = self.token129        self.token = self.lexer.next_token()130        return t131    def match_token(self, type):132        if type != self.token.type:133            error(self.token, "unexpected token %r (should probably be %r)" % (self.token.type, type))134        return self.next_token()135    def parse(self):136        self.enum = {}137        prog = Node("program")138        self.next_token()139        while self.token.type:140            if self.token.type == "enum":141                self.next_token()142                self.match_token("{")143                i = 0144                while self.token.type != "}":145                    n = self.token.name146                    self.match_token("id")147                    if self.token.type == "=":148                        self.next_token()149                        i = self.match_token("number").number150                    self.enum[n] = i151                    i += 1152                    if self.token.type == ",":153                        self.next_token()154                        continue155                    break156                self.match_token("}")157                self.match_token(";")158            # read type and name159            t = self.match_token("id")160            n = self.match_token("id")161            # function162            if self.token.type == "(":163                for k in prog.kids:164                    if k.type == "func" and k.name == n.name:165                        error(n, "redefinition of function %r" % n.name)166                self.next_token()167                node = Node("func")168                if t.name not in ("void", "int"): error(t, "invalid type")169                node.t = t.name170                node.name = n.name171                # TODO: arguments172                self.match_token(")")173                if self.token.type != "{": error(self.token, "no function block")174                node.add(self.stmt())175                prog.add(node)176                continue177            # variable178            if t.name not in ("int"): error(t, "invalid type")179            for k in prog.kids:180                if k.type == "var" and k.name == n.name:181                    error(n, "redefinition of variable %r" % n.name)182            node = Node("var")183            node.t = t.name184            node.name = n.name185            self.match_token(";")186            prog.add(node)187            continue188        return prog189    def stmt(self):190        if self.token.type == "return":191            node = Node("return")192            node.pos = self.token.pos193            self.next_token()194            if self.token.type != ";": node.add(self.expr())195            self.match_token(";")196            return node197        elif self.token.type == "for":198            self.next_token()199            # fake for loop by using a while loop200            node = Node("block")201            self.match_token("(")202            if self.token.type != ";":203                node.add(self.expr())204            self.match_token(";")205            loop = Node("while")206            node.add(loop)207            if self.token.type != ";":208                cond = self.expr()209            else:210                cond = Node("number")211                cond.number = 1212            self.match_token(";")213            loop.add(cond)214            if self.token.type != ")":215                inc = self.expr()216            else:217                inc = None218            self.match_token(")")219            body = Node("block")220            loop.add(body)221            body.add(self.stmt())222            if inc: body.add(inc)223            return node224        elif self.token.type == "while":225            self.next_token()226            node = Node("while")227            self.match_token("(")228            node.add(self.expr())229            self.match_token(")")230            node.add(self.stmt())231            return node232        elif self.token.type == "if":233            self.next_token()234            node = Node("if")235            self.match_token("(")236            node.add(self.expr())237            self.match_token(")")238            node.add(self.stmt())239            if self.token.type == "else":240                self.next_token()241                node.add(self.stmt())242            return node243        elif self.token.type == "{":244            self.next_token()245            node = Node("block")246            while self.token.type != "}": node.add(self.stmt())247            self.next_token()248            return node249        else:250            node = self.expr()251            self.match_token(";")252            return node253    def expr(self, level=0):254        # unary stuff255        if self.token.type == "number":256            node = Node("number")257            node.number = self.next_token().number258        elif self.token.type == "+":259            self.next_token()260            node = self.expr(99)261        elif self.token.type == "-":262            self.next_token()263            node = Node("neg").add(self.expr(99))264        elif self.token.type == "(":265            self.next_token()266            node = self.expr()267            self.match_token(")")268        elif self.token.type == "!":269            self.next_token()270            node = Node("not").add(self.expr(99))271        elif self.token.type == "id":272            t = self.next_token()273            if self.token.type == "(":274                self.next_token()275                node = Node("call")276                node.name = t.name277                node.pos = t.pos278                # TODO: args279                self.match_token(")")280            else:281                if t.name in self.enum:282                    node = Node("number")283                    node.number = self.enum[t.name]284                else:285                    node = Node("use")286                    node.pos = t.pos287                    node.name = t.name288        else:289            error(self.token, "bad expression %r" % self.token.type)290        # infix stuff291        while self.token.type in INFIX_LEVEL and INFIX_LEVEL[self.token.type] >= level:292            tok = self.token.type293            self.next_token()...

Parser.py

Source:Parser.py

...116        # skip comment117        if self.token.type == Token_Type.COMMENT.name:118            self.fetch_token()119        print("-----Exit FetchToken-----")120    def match_token(self, ob):121        print("-----Enter MatchToken-----")122        if self.token.type != ob:123            syntax_error(2, sb=self.token.type, ob=ob)124            print("-----Exit MatchToken-----")125            return False126        print("*****MatchToken " + ob + "*****")127        print("-----Exit MatchToken-----")128        return True129    def program(self):130        print("-----Enter Program-----")131        while self.token.type != Token_Type.NONTOKEN.name:132            self.statement()133            # end with ';'134            self.match_token(Token_Type.SEMICO.name)135            self.fetch_token()136        print("-----Exit Program-----")137    def statement(self):138        print("-----Enter Statement-----")139        if self.token.type == Token_Type.ORIGIN.name:140            self.origin_statement()141        elif self.token.type == Token_Type.SCALE.name:142            self.scale_statement()143        elif self.token.type == Token_Type.ROT.name:144            self.rot_statement()145        elif self.token.type == Token_Type.FOR.name:146            self.for_statement()147        elif self.token.type == Token_Type.COLOR.name:148            self.color_statement()149        else:150            syntax_error(3)151        print("-----Exit Statement-----")152    def origin_statement(self):153        print("-----Enter OriginStatement-----")154        self.match_token(Token_Type.ORIGIN.name)155        self.fetch_token()156        self.match_token(Token_Type.IS.name)157        self.fetch_token()158        self.match_token(Token_Type.L_BRACKET.name)159        self.fetch_token()160        tmp_ptr = self.expression()161        print("--------------------------------------------------")162        print_tree(tmp_ptr)163        print("--------------------------------------------------")164        x = get_expr_value(tmp_ptr)165        self.match_token(Token_Type.COMMA.name)166        self.fetch_token()167        tmp_ptr = self.expression()168        print("--------------------------------------------------")169        print_tree(tmp_ptr)170        print("--------------------------------------------------")171        y = get_expr_value(tmp_ptr)172        self.match_token(Token_Type.R_BRACKET.name)173        self.fetch_token()174        set_origin(x, y)175        print("-----Exit OriginStatement-----")176    def scale_statement(self):177        print("-----Enter ScaleStatement-----")178        self.match_token(Token_Type.SCALE.name)179        self.fetch_token()180        self.match_token(Token_Type.IS.name)181        self.fetch_token()182        self.match_token(Token_Type.L_BRACKET.name)183        self.fetch_token()184        tmp_ptr = self.expression()185        print("--------------------------------------------------")186        print_tree(tmp_ptr)187        print("--------------------------------------------------")188        x = get_expr_value(tmp_ptr)189        self.match_token(Token_Type.COMMA.name)190        self.fetch_token()191        tmp_ptr = self.expression()192        print("--------------------------------------------------")193        print_tree(tmp_ptr)194        print("--------------------------------------------------")195        y = get_expr_value(tmp_ptr)196        self.match_token(Token_Type.R_BRACKET.name)197        self.fetch_token()198        set_scale(x, y)199        print("-----Exit ScaleStatement-----")200    def rot_statement(self):201        print("-----Enter RotStatement-----")202        self.match_token(Token_Type.ROT.name)203        self.fetch_token()204        self.match_token(Token_Type.IS.name)205        self.fetch_token()206        tmp_ptr = self.expression()207        print("--------------------------------------------------")208        print_tree(tmp_ptr)209        print("--------------------------------------------------")210        x = get_expr_value(tmp_ptr)211        # self.fetch_token()212        set_rot(x)213        print("-----Exit RotStatement-----")214    def for_statement(self):215        print("-----Enter ForStatement-----")216        self.match_token(Token_Type.FOR.name)217        self.fetch_token()218        self.match_token(Token_Type.T.name)219        self.fetch_token()220        self.match_token(Token_Type.FROM.name)221        self.fetch_token()222        start_ptr = self.expression()223        print("--------------------------------------------------")224        print_tree(start_ptr)225        print("--------------------------------------------------")226        start = get_expr_value(start_ptr)227        self.match_token(Token_Type.TO.name)228        self.fetch_token()229        end_ptr = self.expression()230        print("--------------------------------------------------")231        print_tree(end_ptr)232        print("--------------------------------------------------")233        end = get_expr_value(end_ptr)234        self.match_token(Token_Type.STEP.name)235        self.fetch_token()236        step_ptr = self.expression()237        print("--------------------------------------------------")238        print_tree(step_ptr)239        print("--------------------------------------------------")240        step = get_expr_value(step_ptr)241        self.match_token(Token_Type.DRAW.name)242        self.fetch_token()243        self.match_token(Token_Type.L_BRACKET.name)244        self.fetch_token()245        x_ptr = self.expression()246        print("--------------------------------------------------")247        print_tree(x_ptr)248        print("--------------------------------------------------")249        self.match_token(Token_Type.COMMA.name)250        self.fetch_token()251        y_ptr = self.expression()252        print("--------------------------------------------------")253        print_tree(y_ptr)254        print("--------------------------------------------------")255        self.match_token(Token_Type.R_BRACKET.name)256        self.fetch_token()257        draw_loop(start, end, step, x_ptr, y_ptr)258        print("-----Exit ForStatement-----")259    def color_statement(self):260        print("-----Enter ColorStatement-----")261        self.match_token(Token_Type.COLOR.name)262        self.fetch_token()263        self.match_token(Token_Type.IS.name)264        self.fetch_token()265        self.match_token(Token_Type.SP_COLOR.name)266        set_color(self.token.lexeme)267        self.fetch_token()268        print("-----Exit ColorStatement-----")269    def expression(self):270        print("-----Enter Expression-----")271        left = self.term()272        while self.token.type == Token_Type.PLUS.name or self.token.type == Token_Type.MINUS.name:273            token_tmp = self.token.type274            self.match_token(token_tmp)275            right = self.term()276            left = ExprNode(token_tmp, lnode=left, rnode=right)277        print("-----Exit Expression-----")278        return left279    def term(self):280        print("-----Enter Term-----")281        left = self.factor()282        while self.token.type == Token_Type.MUL.name or self.token.type == Token_Type.DIV.name:283            token_tmp = self.token.type284            self.match_token(token_tmp)285            self.fetch_token()286            right = self.factor()287            left = ExprNode(token_tmp, lnode=left, rnode=right)288        print("-----Exit Term-----")289        return left290    def factor(self):291        print("-----Enter Factor-----")292        if self.token.type == Token_Type.PLUS.name or self.token.type == Token_Type.MINUS.name:293            token_tmp = self.token.type294            self.match_token(token_tmp)295            left = ExprNode(Token_Type.CONST_ID.name, 0)296            self.fetch_token()297            right = self.factor()298            res = ExprNode(token_tmp, lnode=left, rnode=right)299            print("-----Exit Factor-----")300            return res301        else:302            res = self.component()303            print("-----Exit Factor-----")304            return res305    def component(self):306        print("-----Enter Component-----")307        left = self.atom()308        self.fetch_token()309        while self.token.type == Token_Type.POWER.name:310            token_tmp = self.token.type311            self.match_token(token_tmp)312            self.fetch_token()313            right = self.component()314            left = ExprNode(token_tmp, lnode=left, rnode=right)315        print("-----Exit Component-----")316        return left317    def atom(self):318        print("-----Enter Atom-----")319        if self.token.type == Token_Type.CONST_ID.name:320            print("leaf: " + str(self.token.value))321            print("-----Exit Atom-----")322            return ExprNode(self.token.type, self.token.value)  # leaf323        elif self.token.type == Token_Type.T.name:324            print("leaf: " + self.token.type)325            print("-----Exit Atom-----")326            return ExprNode(self.token.type, self.token.value)  # leaf327        elif self.token.type == Token_Type.FUNC.name:328            token_tmp = self.token.type329            func_tmp = self.token.func330            self.fetch_token()331            self.match_token(Token_Type.L_BRACKET.name)332            self.fetch_token()333            left = self.expression()334            self.match_token(Token_Type.R_BRACKET.name)335            print("-----Exit Atom-----")336            return ExprNode(token_tmp, lnode=left, func=func_tmp)337        elif self.token.type == Token_Type.L_BRACKET:338            self.match_token(Token_Type.L_BRACKET.name)339            self.fetch_token()340            left = self.expression()341            self.match_token(Token_Type.R_BRACKET.name)342            print("-----Exit Atom-----")343            return left344if __name__ == '__main__':345    # init the parser346    p = Parser("test.txt")347    # run the parser348    p.start()349    plt.xlim(0)350    plt.ylim(0)...

RuleOutput.py

Source:RuleOutput.py

1# defines a RuleOutput class2# and its subclasses3# these perform singular operators on Ingredient objects45from .MyNumber import MyNumber6from .Ingredient import Ingredient7from .FormatCheck import listOfStrings, listOfTupleStringBools89class RuleOutput(object):10    def __init__(self):11        raise Exception("creating an instance of RuleOutput base class is forbidden")12    @staticmethod13    def check_conformity(ig,match_token,match_token_length):14        # check that an input to apply makes sense15        if not isinstance(ig,Ingredient):16            raise TypeError("Expected ig to be an Ingredient")17        if type(match_token) != tuple:18            raise TypeError("Expected tuple")19        if type(match_token_length) != int:20            raise TypeError("Expected int")21        if len(match_token) != match_token_length:22            raise ValueError("Expected tuple of length "+str(match_token_length))23        if not all(map(lambda x: type(x) == int, match_token)):24            raise TypeError("Expected tuple filled with ints")2526class NoneRuleOutput(RuleOutput):27    def __init__(self):28        pass29    @staticmethod30    def apply(ig,match_token):31        return ig32    @staticmethod33    def priority():34        return 13536NoneRuleOutputInstance = NoneRuleOutput()3738class RenamingRuleOutput(RuleOutput):39    def __init__(self,output_name):40        if output_name is not None:41            listOfStrings(output_name)42        self.output_name = output_name43    def apply(self,ig,match_token):44        if self.output_name is None:45            return ig46        # match token must come from SinglePattern47        self.check_conformity(ig,match_token,2)48        output = ig.duplicate()49        if match_token[0] == 1:50            # editing unit51            output.unit = output.unit[:max(0,match_token[1])] + self.output_name52        else:53            #editing name54            output.name = output.name[:max(0,match_token[1])] + self.output_name55        return output56    @staticmethod57    def priority():58        return 25960class PrefixingRuleOutput(RuleOutput):61    def __init__(self,prefix):62        listOfStrings(prefix)63        self.prefix = prefix64    def apply(self,ig,match_token):65        # match token must come from SinglePattern66        self.check_conformity(ig,match_token,2)67        if match_token[1] > 0:68            # if the input already has a prefix,69            # we shouldn't change it70            return ig71        output = ig.duplicate()72        if match_token[0] == 1:73            # editing unit74            output.unit = self.prefix + output.unit75        else:76            # editing name77            output.name = self.prefix + output.name78        return output79    @staticmethod80    def priority():81        return 38283class InsertingRuleOutput(RuleOutput):84    def __init__(self,pattern_size,insertion):85        if type(pattern_size) != int:86            raise TypeError("Expeected int")87        if insertion != []:88            listOfStrings(insertion)89        self.pattern_size = pattern_size90        self.insertion = insertion91    def apply(self,ig,match_token):92        # match token must come from SinglePattern93        self.check_conformity(ig,match_token,2)94        output = ig.duplicate()95        if match_token[0] == 1:96            # editing unit97            output.unit = output.unit[:max(0,match_token[1])] + self.insertion + output.unit[max(0,match_token[1])+self.pattern_size:]98        else:99            # editing name100            output.name = output.name[:max(0,match_token[1])] + self.insertion + output.name[max(0,match_token[1])+self.pattern_size:]101        return output102    @staticmethod103    def priority():104        return 2105106class SingleConvertingRuleOutput(RenamingRuleOutput):107    def __init__(self,ratio,output_name):108        super().__init__(output_name)109        if not isinstance(ratio,MyNumber):110            raise TypeError("Expected MyNumber")111        self.ratio = ratio112    def apply(self,ig,match_token):113        self.check_conformity(ig,match_token,2)114        output = super().apply(ig,match_token).duplicate()115        output.count = output.count * self.ratio116        return output117    @staticmethod118    def priority():119        return 5120121class DoubleConvertingRuleOutput(RuleOutput):122    def __init__(self,ratio,output_unit,output_name):123        # ratio, output_unit, and output_name124        # may each be None to indicate a wildcard125        if ratio is not None:126            if not isinstance(ratio,MyNumber):127                raise TypeError("Expected MyNumber")128        if output_unit is not None:129            output_unit = RenamingRuleOutput(output_unit)130        if output_name is not None:131            output_name = RenamingRuleOutput(output_name)132        self.ratio = ratio133        self.output_unit = output_unit134        self.output_name = output_name135    def apply(self,ig,match_token):136        # match_token must be from DoublePattern137        self.check_conformity(ig,match_token,3)138        if self.output_unit is not None:139            ig = self.output_unit.apply(ig,(1,max(0,match_token[1])))140        if self.output_name is not None:141            ig = self.output_name.apply(ig,(2,max(0,match_token[2])))142        if self.ratio is not None:143            ig = ig.duplicate()144            ig.count = ig.count * self.ratio145        return ig146    @staticmethod147    def priority():148        return 5149150class PropertiesRuleOutput(RuleOutput):151    def __init__(self,base,edits):152        if not isinstance(base,RuleOutput):153            raise TypeError("Expected child class of RuleOutput")154        listOfTupleStringBools(edits)155        self.base = base156        self.edits = edits157    def apply(self,ig,match_token):158        output = self.base.apply(ig,match_token).duplicate()159        for edit in self.edits:160            # edit is (str,bool)161            if edit[1]:162                output.props.add(edit[0])163            else:164                if edit[0] == "$":165                    # remove all166                    output.props = set()167                elif edit[0] in output.props:168                    output.props.remove(edit[0])169        return output170    def priority(self):171        return self.base.priority()172173class DecRuleOutput(RuleOutput):174    def __init__(self):175        pass176    @staticmethod177    def apply(ig,match_token):178        output = ig.duplicate()179        output.count = output.count.as_float()180        return output181    @staticmethod182    def priority():183        return 1184185DecRuleOutputInstance = DecRuleOutput()186187class FracRuleOutput(RuleOutput):188    def __init__(self):189        pass190    @staticmethod191    def apply(ig,match_token):192        output = ig.duplicate()193        output.count = output.count.as_fraction(10)194        return output195    @staticmethod196    def priority():197        return 1198    
...

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