How to use code method in Slash

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test_bytecode_modification.py

Source:test_bytecode_modification.py

1import dis2import sys3import unittest4from io import StringIO5from _pydevd_frame_eval.pydevd_modify_bytecode import insert_code6TRACE_MESSAGE = "Trace called"7def tracing():8    print(TRACE_MESSAGE)9def call_tracing():10    tracing()11def bar(a, b):12    return a + b13IS_PY36 = sys.version_info[0] == 3 and sys.version_info[1] == 614@unittest.skipIf(not IS_PY36, reason='Test requires Python 3.6')15class TestInsertCode(unittest.TestCase):16    lines_separator = "---Line tested---"17    def check_insert_every_line(self, func_to_modify, func_to_insert, number_of_lines):18        first_line = func_to_modify.__code__.co_firstlineno + 119        last_line = first_line + number_of_lines20        for i in range(first_line, last_line):21            self.check_insert_to_line_with_exec(func_to_modify, func_to_insert, i)22            print(self.lines_separator)23    def check_insert_to_line_with_exec(self, func_to_modify, func_to_insert, line_number):24        code_orig = func_to_modify.__code__25        code_to_insert = func_to_insert.__code__26        success, result = insert_code(code_orig, code_to_insert, line_number)27        exec(result)28        output = sys.stdout.getvalue().strip().split(self.lines_separator)[-1]29        self.assertTrue(TRACE_MESSAGE in output)30    def check_insert_to_line_by_symbols(self, func_to_modify, func_to_insert, line_number, code_for_check):31        code_orig = func_to_modify.__code__32        code_to_insert = func_to_insert.__code__33        success, result = insert_code(code_orig, code_to_insert, line_number)34        self.compare_bytes_sequence(list(result.co_code), list(code_for_check.co_code))35    def compare_bytes_sequence(self, code1, code2):36        seq1 = [(offset, op, arg) for offset, op, arg in dis._unpack_opargs(code1)]37        seq2 = [(offset, op, arg) for offset, op, arg in dis._unpack_opargs(code2)]38        self.assertTrue(len(seq1) == len(seq2), "Bytes sequences have different lengths")39        for i in range(len(seq1)):40            of, op1, arg1 = seq1[i]41            _, op2, arg2 = seq2[i]42            self.assertEqual(op1, op2, "Different operators at offset {}".format(of))43            if arg1 != arg2:44                if op1 in (100, 101, 106, 116):45                    # Sometimes indexes of variable names and consts may be different, when we insert them, it's ok46                    continue47                else:48                    self.assertEquals(arg1, arg2, "Different arguments at offset {}".format(of))49    def test_assignment(self):50        self.original_stdout = sys.stdout51        sys.stdout = StringIO()52        try:53            def original():54                a = 155                b = 256                c = 357            self.check_insert_every_line(original, tracing, 3)58        finally:59            sys.stdout = self.original_stdout60    def test_for_loop(self):61        self.original_stdout = sys.stdout62        sys.stdout = StringIO()63        try:64            def original():65                n = 366                sum = 067                for i in range(n):68                    sum += i69                return sum70            self.check_insert_every_line(original, tracing, 5)71        finally:72            sys.stdout = self.original_stdout73    def test_if(self):74        self.original_stdout = sys.stdout75        sys.stdout = StringIO()76        try:77            def original():78                if True:79                    a = 180                else:81                    a = 082                print(a)83            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 2)84            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 5)85        finally:86            sys.stdout = self.original_stdout87    def test_else(self):88        self.original_stdout = sys.stdout89        sys.stdout = StringIO()90        try:91            def original():92                if False:93                    a = 194                else:95                    a = 096                print(a)97            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 4)98            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 5)99        finally:100            sys.stdout = self.original_stdout101    def test_for_else(self):102        self.original_stdout = sys.stdout103        sys.stdout = StringIO()104        try:105            def original():106                sum = 0107                for i in range(3):108                    sum += i109                else:110                    print(sum)111            def check_line_1():112                tracing()113                sum = 0114                for i in range(3):115                    sum += i116                else:117                    print(sum)118            def check_line_3():119                sum = 0120                for i in range(3):121                    tracing()122                    sum += i123                else:124                    print(sum)125            def check_line_5():126                sum = 0127                for i in range(3):128                    sum += i129                else:130                    tracing()131                    print(sum)132            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 1)133            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 3)134            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 5)135            sys.stdout = self.original_stdout136            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 1,137                                                 check_line_1.__code__)138            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 3,139                                                 check_line_3.__code__)140            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 5,141                                                 check_line_5.__code__)142        finally:143            sys.stdout = self.original_stdout144    def test_elif(self):145        self.original_stdout = sys.stdout146        sys.stdout = StringIO()147        try:148            def original():149                a = 5150                b = 0151                if a < 0:152                    print("a < 0")153                elif a < 3:154                    print("a < 3")155                else:156                    print("a >= 3")157                    b = a158                return b159            def check_line_1():160                tracing()161                a = 5162                b = 0163                if a < 0:164                    print("a < 0")165                elif a < 3:166                    print("a < 3")167                else:168                    print("a >= 3")169                    b = a170                return b171            def check_line_8():172                a = 5173                b = 0174                if a < 0:175                    print("a < 0")176                elif a < 3:177                    print("a < 3")178                else:179                    tracing()180                    print("a >= 3")181                    b = a182                return b183            def check_line_9():184                a = 5185                b = 0186                if a < 0:187                    print("a < 0")188                elif a < 3:189                    print("a < 3")190                else:191                    print("a >= 3")192                    tracing()193                    b = a194                return b195            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 1)196            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 2)197            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 8)198            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 9)199            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 1,200                                                 check_line_1.__code__)201            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 8,202                                                 check_line_8.__code__)203            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 9,204                                                 check_line_9.__code__)205        finally:206            sys.stdout = self.original_stdout207    def test_call_other_function(self):208        self.original_stdout = sys.stdout209        sys.stdout = StringIO()210        try:211            def original():212                a = 1213                b = 3214                c = bar(a, b)215                return c216            def check_line_3():217                a = 1218                b = 3219                tracing()220                c = bar(a, b)221                return c222            def check_line_4():223                a = 1224                b = 3225                c = bar(a, b)226                tracing()227                return c228            self.check_insert_every_line(original, tracing, 4)229            sys.stdout = self.original_stdout230            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 3,231                                                 check_line_3.__code__)232            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 4,233                                                 check_line_4.__code__)234        finally:235            sys.stdout = self.original_stdout236    def test_class_method(self):237        self.original_stdout = sys.stdout238        sys.stdout = StringIO()239        try:240            class A(object):241                @staticmethod242                def foo():243                    print("i'm in foo")244                @staticmethod245                def check_line_2():246                    tracing()247                    print("i'm in foo")248            original = A.foo249            self.check_insert_to_line_with_exec(original, tracing, original.__code__.co_firstlineno + 2)250            self.check_insert_to_line_by_symbols(original, call_tracing, original.__code__.co_firstlineno + 2,251                                                 A.check_line_2.__code__)252        finally:253            sys.stdout = self.original_stdout254    def test_offset_overflow(self):255        self.original_stdout = sys.stdout256        sys.stdout = StringIO()257        try:258            def foo():259                a = 1260                b = 2  # breakpoint261                c = 3262                a1 = 1 if a > 1 else 2263                a2 = 1 if a > 1 else 2264                a3 = 1 if a > 1 else 2265                a4 = 1 if a > 1 else 2266                a5 = 1 if a > 1 else 2267                a6 = 1 if a > 1 else 2268                a7 = 1 if a > 1 else 2269                a8 = 1 if a > 1 else 2270                a9 = 1 if a > 1 else 2271                a10 = 1 if a > 1 else 2272                a11 = 1 if a > 1 else 2273                a12 = 1 if a > 1 else 2274                a13 = 1 if a > 1 else 2275                for i in range(1):276                    if a > 0:277                        print("111")278                        # a = 1279                    else:280                        print("222")281                return b282            def check_line_2():283                a = 1284                tracing()285                b = 2286                c = 3287                a1 = 1 if a > 1 else 2288                a2 = 1 if a > 1 else 2289                a3 = 1 if a > 1 else 2290                a4 = 1 if a > 1 else 2291                a5 = 1 if a > 1 else 2292                a6 = 1 if a > 1 else 2293                a7 = 1 if a > 1 else 2294                a8 = 1 if a > 1 else 2295                a9 = 1 if a > 1 else 2296                a10 = 1 if a > 1 else 2297                a11 = 1 if a > 1 else 2298                a12 = 1 if a > 1 else 2299                a13 = 1 if a > 1 else 2300                for i in range(1):301                    if a > 0:302                        print("111")303                        # a = 1304                    else:305                        print("222")306                return b307            self.check_insert_to_line_with_exec(foo, tracing, foo.__code__.co_firstlineno + 2)308            self.check_insert_to_line_by_symbols(foo, call_tracing, foo.__code__.co_firstlineno + 2,309                                                 check_line_2.__code__)310        finally:311            sys.stdout = self.original_stdout312    def test_long_lines(self):313        self.original_stdout = sys.stdout314        sys.stdout = StringIO()315        try:316            def foo():317                a = 1318                b = 1 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23319                c = 1 if b > 1 else 2 if b > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23320                d = 1 if c > 1 else 2 if c > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23321                e = d + 1322                return e323            def check_line_2():324                a = 1325                tracing()326                b = 1 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23327                c = 1 if b > 1 else 2 if b > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23328                d = 1 if c > 1 else 2 if c > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23 if a > 1 else 2 if a > 0 else 3 if a > 4 else 23329                e = d + 1330                return e331            self.check_insert_to_line_with_exec(foo, tracing, foo.__code__.co_firstlineno + 2)332            sys.stdout = self.original_stdout333            self.check_insert_to_line_by_symbols(foo, call_tracing, foo.__code__.co_firstlineno + 2,334                                                 check_line_2.__code__)335        finally:336            sys.stdout = self.original_stdout337    def test_many_names(self):338        self.original_stdout = sys.stdout339        sys.stdout = StringIO()340        try:341            from tests_pydevd_python._bytecode_many_names_example import foo342            self.check_insert_to_line_with_exec(foo, tracing, foo.__code__.co_firstlineno + 2)343        finally:344            sys.stdout = self.original_stdout345    def test_extended_arg_overflow(self):346        from tests_pydevd_python._bytecode_overflow_example import Dummy, DummyTracing347        self.check_insert_to_line_by_symbols(Dummy.fun, call_tracing, Dummy.fun.__code__.co_firstlineno + 3,348                                             DummyTracing.fun.__code__)349    def test_double_extended_arg(self):350        self.original_stdout = sys.stdout351        sys.stdout = StringIO()352        try:353            def foo():354                a = 1355                b = 2356                if b > 0:357                    d = a + b358                    d += 1359                    b = b - 1 if a > 0 else b + 1360                    b = b - 1 if a > 0 else b + 1361                    b = b - 1 if a > 0 else b + 1362                    b = b - 1 if a > 0 else b + 1363                    b = b - 1 if a > 0 else b + 1364                    b = b - 1 if a > 0 else b + 1365                    b = b - 1 if a > 0 else b + 1366                    b = b - 1 if a > 0 else b + 1367                    b = b - 1 if a > 0 else b + 1368                    b = b - 1 if a > 0 else b + 1369                    b = b - 1 if a > 0 else b + 1370                    b = b - 1 if a > 0 else b + 1371                    b = b - 1 if a > 0 else b + 1372                    b = b - 1 if a > 0 else b + 1373                    b = b - 1 if a > 0 else b + 1374                    b = b - 1 if a > 0 else b + 1375                    b = b - 1 if a > 0 else b + 1376                    b = b - 1 if a > 0 else b + 1377                    b = b - 1 if a > 0 else b + 1378                a = a + 1379                return a380            def foo_check():381                a = 1382                b = 2383                tracing()384                if b > 0:385                    d = a + b386                    d += 1387                    b = b - 1 if a > 0 else b + 1388                    b = b - 1 if a > 0 else b + 1389                    b = b - 1 if a > 0 else b + 1390                    b = b - 1 if a > 0 else b + 1391                    b = b - 1 if a > 0 else b + 1392                    b = b - 1 if a > 0 else b + 1393                    b = b - 1 if a > 0 else b + 1394                    b = b - 1 if a > 0 else b + 1395                    b = b - 1 if a > 0 else b + 1396                    b = b - 1 if a > 0 else b + 1397                    b = b - 1 if a > 0 else b + 1398                    b = b - 1 if a > 0 else b + 1399                    b = b - 1 if a > 0 else b + 1400                    b = b - 1 if a > 0 else b + 1401                    b = b - 1 if a > 0 else b + 1402                    b = b - 1 if a > 0 else b + 1403                    b = b - 1 if a > 0 else b + 1404                    b = b - 1 if a > 0 else b + 1405                    b = b - 1 if a > 0 else b + 1406                a = a + 1407                return a408            self.check_insert_to_line_with_exec(foo, tracing, foo.__code__.co_firstlineno + 2)409            sys.stdout = self.original_stdout410            self.check_insert_to_line_by_symbols(foo, call_tracing, foo.__code__.co_firstlineno + 3,411                                                 foo_check.__code__)412        finally:...

compiler.py

Source:compiler.py

1"""2    (c) Tivole3    Compiler for 'Turing Code'4"""5# Libraries6import copy7__code__ = open('turing_code.txt', 'r')8__lines__ = __code__.readlines()9__lines_backend__ = copy.deepcopy(__lines__)10# Removing empty lines11while '\n' in __lines__:12    __lines__.remove('\n')13# Checking for symbols ';', ',', '->', '{' and '}'14__passed_lines__ = 015__checked_codes__ = []16for __i__ in range(len(__lines__)):17    __passed_lines__ += 118    if '#' in __lines__[__i__]:19        __checking_line__ = __lines__[__i__][:__lines__[__i__].find('#')]20        if __checking_line__ == '':21            __passed_lines__ -= 122            continue23    else:24        __checking_line__ = __lines__[__i__]25    # Check for symbol ';'26    assert ';' in __checking_line__, f'(!) Compilation Error. Missing \';\' in line {__lines_backend__.index(__lines__[__i__]) + 1}'27    28    if __passed_lines__ >= 5:29        # Check for symbol '->'30        assert '->' in __checking_line__, f'(!) Compilation Error. Missing \'->\' in line {__lines_backend__.index(__lines__[__i__]) + 1}'31        32        # Check for symbol ','33        assert __checking_line__.count(',') == 3, f'(!) Compilation Error. Invalid syntax in line {__lines_backend__.index(__lines__[__i__]) + 1}'34        # Check for unkown commands35        __unknown_command__ = __checking_line__[__checking_line__.find(';') + 1:].replace('\n', '')36        assert __checking_line__[__checking_line__.find(';') + 1:].replace(' ', '').replace('\n', '') in '', f'(!) Compilation Error. Unkown command \'{__unknown_command__}\' in line {__lines_backend__.index(__lines__[__i__]) + 1}'37    38        # Check for double commands39        assert not __checking_line__.replace('\n', '') in __checked_codes__, f'(!) Compilation Error. Doubled Turing code in line {__lines_backend__.index(__lines__[__i__]) + 1}'40        __checked_codes__.append(__checking_line__.replace('\n', ''))41    else:42        assert '{' in __checking_line__, '(!) Compilation Error. Missing \'{\'' + f' in line {__lines_backend__.index(__lines__[__i__]) + 1}'43        assert '}' in __checking_line__, '(!) Compilation Error. Missing \'}\'' + f' in line {__lines_backend__.index(__lines__[__i__]) + 1}'44# Removing commentaries for compiling45for __i__ in range(len(__lines__)):46    if '#' in __lines__[__i__]:47        if __lines__[__i__].find('#') > 0:48            __lines__[__i__] = __lines__[__i__][:__lines__[__i__].find('#')]49        else:50            __lines__[__i__] = '\n'51# Removing unnecessary symbols for compiling52for __i__ in range(len(__lines__)):53    # Removing ' '54    if ' ' in __lines__[__i__]:55        __lines__[__i__] = __lines__[__i__].replace(' ', '')56    # Removing '\n'57    if '\n' in __lines__[__i__]:58        __lines__[__i__] = __lines__[__i__].replace('\n', '')59# Removing empty lines60while '' in __lines__:61    __lines__.remove('')62# Checking Alphabet63assert 'ALPHABET' in __lines__[0], '(!) Compilation Error. ALPHABET is missing!'64# Checking Empty symbol65assert 'EMPTY' in __lines__[1], '(!) Compilation Error. Empty symbol (\'EMPTY\') is missing!'66# Checking START_STATE and STOP_STATE 67assert 'START_STATE' in __lines__[2], '(!) Compilation Error. START_STATE is missing!'68assert 'STOP_STATE' in __lines__[3], '(!) Compilation Error. STOP_STATE is missing!'69# Reading Alphabet70__ALPHABET__ = __lines__[0][__lines__[0].find('{') + 1:__lines__[0].find('}')].replace(' ', '').split(',')71# Reading Empty symbol72__EMPTY__ = __lines__[1][__lines__[1].find('{') + 1:__lines__[1].find('}')].replace(' ', '').split(',')[0]73if __lines__[1][__lines__[1].find('{') + 1:__lines__[1].find('}')].count(',') == 1:74    __NUMBER_OF_EMPTY__ = int(__lines__[1][__lines__[1].find('{') + 1:__lines__[1].find('}')].replace(' ', '').split(',')[1])75else:76    __NUMBER_OF_EMPTY__ = 2577# Readding START_STATE and STOP_STATE78__START_STATE__ = __lines__[2][__lines__[2].find('{') + 1:__lines__[2].find('}')].replace(' ', '')79__STOP_STATE__ = __lines__[3][__lines__[3].find('{') + 1:__lines__[3].find('}')].replace(' ', '')80# Checking EMPTY symbol81assert __EMPTY__ in __ALPHABET__, f'(!) Compilation Error. Empty symbol \'{__EMPTY__}\' is not found in ALPHABET.'82# Reading codes83__CODE__ = []84for __i__ in range(4, len(__lines__)):85    __CODE__.append(tuple(__lines__[__i__][:__lines__[__i__].find(';')].replace(' ', '').replace('->', ',').split(',')))86# Checking is all symbols from ALPHABET87for __i__ in range(len(__CODE__)):88    assert __CODE__[__i__][1] in __ALPHABET__, f'(!) Compilation Error. Symbol \'{__CODE__[__i__][1]}\' not found in the ALPHABET.'89    assert __CODE__[__i__][3] in __ALPHABET__, f'(!) Compilation Error. Symbol \'{__CODE__[__i__][3]}\' not found in the ALPHABET.'90    assert __CODE__[__i__][4] in ['L', 'R', 'S'], f'(!) Compilation Error. Symbol \'{__CODE__[__i__][4]}\' is unknown. Use only L, R or S.'91# Checking is all states defined92for __i__ in range(len(__CODE__)):93    if __CODE__[__i__][2] != __STOP_STATE__:94        assert __CODE__[__i__][2] in [__CODE__[__j__][0] for __j__ in range(len(__CODE__))], f'(!) Compilation Error. Udefined state \'{__CODE__[__i__][2]}\''95# Checking is __START_STATE__ defined96assert __START_STATE__ in [__CODE__[__j__][0] for __j__ in range(len(__CODE__))], f'(!) Compilation Error. Start state \'{__START_STATE__}\' is undefined.'97def get_empty_symbol():98    return __EMPTY__99def Turing_Machine(Sequence_INPUT):100    """101        Function to program Turing Machine code.102    """103    # Checking INPUT Sequence104    for c in Sequence_INPUT:105        assert c in __ALPHABET__, f'(!) Compilation Error. Unknown symbol \'{c}\' in input data. Check ALPHABET.'106    Sequence_INPUT = list(__EMPTY__ * __NUMBER_OF_EMPTY__ + Sequence_INPUT + __EMPTY__ * __NUMBER_OF_EMPTY__)107    Sequence = copy.deepcopy(Sequence_INPUT)108    109    state = __START_STATE__110    # Put the machine_arrow in the right place111    machine_arrow = 0112    while Sequence_INPUT[machine_arrow] == __EMPTY__:113        machine_arrow += 1114    Sequences_OUTPUT = []115    Sequences_OUTPUT.append([copy.deepcopy(Sequence_INPUT), state, machine_arrow, ''])116    TM_STOP = False117    while not TM_STOP:118        Find = False119        for i in range(len(__CODE__)):120            STOP = False121            if state == __CODE__[i][0] and Sequence[machine_arrow] == __CODE__[i][1]:122                Find = True123                Sequence[machine_arrow] = __CODE__[i][3]124                state = __CODE__[i][2]125                if __CODE__[i][4] == 'R':126                    machine_arrow += 1 # Go RIGHT127                elif __CODE__[i][4] == 'L':128                    machine_arrow -= 1 # Go LEFT129                elif __CODE__[i][4] == 'S':130                    machine_arrow = machine_arrow  # STOP131                    STOP = True132                break133        if not Find:134            assert Find, f'(!) Compilation Error. Undefined action for state=\'{state}\' and symbol \'{Sequence[machine_arrow]}\'.'135            break136        Sequences_OUTPUT.append([copy.deepcopy(Sequence), state, machine_arrow, __CODE__[i][4]])137        if state == __STOP_STATE__ and STOP == True:138            TM_STOP = True...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.