How to use mark_forced method in hypothesis

Best Python code snippet using hypothesis

datatree.py

Source:datatree.py

...103    def forced(self):104        if not self.__forced:105            return EMPTY106        return self.__forced107    def mark_forced(self, i):108        """Note that the value at index ``i`` was forced."""109        assert 0 <= i < len(self.values)110        if self.__forced is None:111            self.__forced = set()112        self.__forced.add(i)113    def split_at(self, i):114        """Splits the tree so that it can incorporate115        a decision at the ``draw_bits`` call corresponding116        to position ``i``, or raises ``Flaky`` if that was117        meant to be a forced node."""118        if i in self.forced:119            inconsistent_generation()120        assert not self.is_exhausted121        key = self.values[i]122        child = TreeNode(123            bit_lengths=self.bit_lengths[i + 1 :],124            values=self.values[i + 1 :],125            transition=self.transition,126        )127        self.transition = Branch(bit_length=self.bit_lengths[i], children={key: child})128        if self.__forced is not None:129            child.__forced = {j - i - 1 for j in self.__forced if j > i}130            self.__forced = {j for j in self.__forced if j < i}131        child.check_exhausted()132        del self.values[i:]133        del self.bit_lengths[i:]134        assert len(self.values) == len(self.bit_lengths) == i135    def check_exhausted(self):136        """Recalculates ``self.is_exhausted`` if necessary then returns137        it."""138        if (139            not self.is_exhausted140            and len(self.forced) == len(self.values)141            and self.transition is not None142        ):143            if isinstance(self.transition, Conclusion):144                self.is_exhausted = True145            elif len(self.transition.children) == self.transition.max_children:146                self.is_exhausted = all(147                    v.is_exhausted for v in self.transition.children.values()148                )149        return self.is_exhausted150class DataTree(object):151    """Tracks the tree structure of a collection of ConjectureData152    objects, for use in ConjectureRunner."""153    def __init__(self):154        self.root = TreeNode()155    @property156    def is_exhausted(self):157        """Returns True if every possible node is dead and thus the language158        described must have been fully explored."""159        return self.root.is_exhausted160    def generate_novel_prefix(self, random):161        """Generate a short random string that (after rewriting) is not162        a prefix of any buffer previously added to the tree.163        The resulting prefix is essentially arbitrary - it would be nice164        for it to be uniform at random, but previous attempts to do that165        have proven too expensive.166        """167        assert not self.is_exhausted168        novel_prefix = bytearray()169        def append_int(n_bits, value):170            novel_prefix.extend(int_to_bytes(value, bits_to_bytes(n_bits)))171        current_node = self.root172        while True:173            assert not current_node.is_exhausted174            for i, (n_bits, value) in enumerate(175                zip(current_node.bit_lengths, current_node.values)176            ):177                if i in current_node.forced:178                    append_int(n_bits, value)179                else:180                    while True:181                        k = random.getrandbits(n_bits)182                        if k != value:183                            append_int(n_bits, k)184                            break185                    # We've now found a value that is allowed to186                    # vary, so what follows is not fixed.187                    return hbytes(novel_prefix)188            else:189                assert not isinstance(current_node.transition, Conclusion)190                if current_node.transition is None:191                    return hbytes(novel_prefix)192                branch = current_node.transition193                assert isinstance(branch, Branch)194                n_bits = branch.bit_length195                while True:196                    k = random.getrandbits(n_bits)197                    try:198                        child = branch.children[k]199                    except KeyError:200                        append_int(n_bits, k)201                        return hbytes(novel_prefix)202                    if not child.is_exhausted:203                        append_int(n_bits, k)204                        current_node = child205                        break206    def rewrite(self, buffer):207        """Use previously seen ConjectureData objects to return a tuple of208        the rewritten buffer and the status we would get from running that209        buffer with the test function. If the status cannot be predicted210        from the existing values it will be None."""211        buffer = hbytes(buffer)212        data = ConjectureData.for_buffer(buffer)213        try:214            self.simulate_test_function(data)215            return (data.buffer, data.status)216        except PreviouslyUnseenBehaviour:217            return (buffer, None)218    def simulate_test_function(self, data):219        """Run a simulated version of the test function recorded by220        this tree. Note that this does not currently call ``stop_example``221        or ``start_example`` as these are not currently recorded in the222        tree. This will likely change in future."""223        node = self.root224        try:225            while True:226                for i, (n_bits, previous) in enumerate(227                    zip(node.bit_lengths, node.values)228                ):229                    v = data.draw_bits(230                        n_bits, forced=node.values[i] if i in node.forced else None231                    )232                    if v != previous:233                        raise PreviouslyUnseenBehaviour()234                if isinstance(node.transition, Conclusion):235                    t = node.transition236                    data.conclude_test(t.status, t.interesting_origin)237                elif node.transition is None:238                    raise PreviouslyUnseenBehaviour()239                else:240                    v = data.draw_bits(node.transition.bit_length)241                    try:242                        node = node.transition.children[v]243                    except KeyError:244                        raise PreviouslyUnseenBehaviour()245        except StopTest:246            pass247    def new_observer(self):248        return TreeRecordingObserver(self)249class TreeRecordingObserver(DataObserver):250    def __init__(self, tree):251        self.__current_node = tree.root252        self.__index_in_current_node = 0253        self.__trail = [self.__current_node]254    def draw_bits(self, n_bits, forced, value):255        i = self.__index_in_current_node256        self.__index_in_current_node += 1257        node = self.__current_node258        assert len(node.bit_lengths) == len(node.values)259        if i < len(node.bit_lengths):260            if n_bits != node.bit_lengths[i]:261                inconsistent_generation()262            # Note that we don't check whether a previously263            # forced value is now free. That will be caught264            # if we ever split the node there, but otherwise265            # may pass silently. This is acceptable because it266            # means we skip a hash set lookup on every267            # draw and that's a pretty niche failure mode.268            if forced and i not in node.forced:269                inconsistent_generation()270            if value != node.values[i]:271                node.split_at(i)272                assert i == len(node.values)273                new_node = TreeNode()274                branch = node.transition275                branch.children[value] = new_node276                self.__current_node = new_node277                self.__index_in_current_node = 0278        else:279            trans = node.transition280            if trans is None:281                node.bit_lengths.append(n_bits)282                node.values.append(value)283                if forced:284                    node.mark_forced(i)285            elif isinstance(trans, Conclusion):286                assert trans.status != Status.OVERRUN287                # We tried to draw where history says we should have288                # stopped289                inconsistent_generation()290            else:291                assert isinstance(trans, Branch)292                if n_bits != trans.bit_length:293                    inconsistent_generation()294                try:295                    self.__current_node = trans.children[value]296                except KeyError:297                    self.__current_node = trans.children.setdefault(value, TreeNode())298                self.__index_in_current_node = 0...

stones.py

Source:stones.py

1#-------------------------------------------------------------------------------2# Name:        Go board recognition project3# Purpose:     Go stone and stone collection class4#5# Author:      kol6#7# Created:     23.12.20198# Copyright:   (c) kol 20199# Licence:     MIT10#-------------------------------------------------------------------------------11from .grdef import *12from .utils import format_stone_pos, stone_pos_from_str13import numpy as np14# A stone class15class GrStone(object):16    """A stone class.17    This class holds one stone parameters as a list with the following indexes:18        GR_X    X position on a board (absolute, edges ignored, 0:image width)19        GR_Y    Y position (0:image height)20        GR_A    Position on horizontal axis (1:board_size, minimum on left side)21        GR_B    Position on vertical axis (1:board size, minimum on bottom)22        GR_R    Stone circle radius23        GR_BW   Color (either STONE_BLACK or STONE_WHITE)24    """25    def __init__(self, stone = None, bw = None):26        self.forced = False27        self.added = False28        self.v, self.def_v = None, None29        if stone is not None:30            self.set(stone, bw)31    @property32    def pos(self):33        """Stone position in text format (A10, B2, etc)"""34        return format_stone_pos(self.v, axis = None)35    def __str__(self):36        return self.pos37    def __iter__(self):38        """Iterator"""39        yield from self.v40    def __getitem__(self, index):41        """Getter"""42        return self.v[index]43    def set(self, stone, bw = None):44        """Assign stone params"""45        if stone is None:46            return47        elif isinstance(stone, GrStone):48            self.v = stone.v49            if self.def_v is None: self.def_v = stone.def_v50        elif type(stone) is np.ndarray or type(stone) is list or type(stone) is tuple:51            if len(stone) <= GR_BW and bw is None:52                raise Exception('Color has to be provided')53            # Coordinates are expected to be integer while other props could be of any type54            self.v = [int(x) for x in stone[0:GR_BW]]55            if len(stone) <= GR_BW:56                self.v.extend([None] * (GR_BW - len(stone) + 1))57                self.v[GR_BW] = bw58            else:59                self.v[GR_BW:] = [x for x in stone[GR_BW:]]60            if self.def_v is None: self.def_v = self.v.copy()61        else:62            raise ValueError("Don't know how to handle type " + str(type(stone)))63    def tolist(self):64        """Return stone parameters as a list"""65        return self.v[0:GR_BW+1] if self.v is not None else None66    def to_fulllist(self):67        return [68            self.v[0:GR_BW],69            self.v[GR_BW],70            self.def_v[0:GR_BW],71            self.def_v[GR_BW],72            self.added] if self.v is not None else None73    def from_fulllist(self, f):74        if len(f) < 4:75            raise ValueError("Invalid forced stone list format")76        self.v = list(f[0])77        self.v.extend([f[1]])78        self.def_v = list(f[2])79        self.def_v.extend([f[3]])80        self.forced = True81        self.added = f[4] if len(f) > 4 else False82# Stone collection83class GrStones(object):84    """A collection of stones on board"""85    def __init__(self, stones = None, bw = None):86        self.__stones = dict()87        if stones is not None:88            if bw is None:89                raise ValueError("Stone color not specified")90            self.assign(stones, bw)91    @property92    def stones(self):93        """Stones collection (dictionary with position as a key)"""94        return self.__stones95    @stones.setter96    def stones(self, value):97        """Assign stones from another collection"""98        self.assign(value, True)99    @property100    def black(self):101        """List of black stones"""102        return [self.__stones[k].v for k in self.__stones if self.__stones[k][GR_BW] == STONE_BLACK]103    @property104    def white(self):105        """List of white stones"""106        return [self.__stones[k].v for k in self.__stones if self.__stones[k][GR_BW] == STONE_WHITE]107    def keys(self):108        """List of stone positions on board"""109        return self.__stones.keys()110    def forced_stones(self):111        """Positions of stones with parameters forcefully changed or stone added"""112        return [k for k in self.__stones if self.__stones[k].forced]113    def unforced_stones(self):114        """Positions of stone which were not forced"""115        return [k for k in self.__stones if not self.__stones[k].forced]116    def changed_stones(self):117        """Positions of stone with parameters changed since detection"""118        return [k for k in self.__stones119            if self.__stones[k].bw != self.__stones[k].def_bw or \120            not all(np.equal(self.__stones[k].v, self.__stones[k].def_v))]121    def relocated_stones(self):122        """List of stones which had changed color """123        return [k for k in self.__stones124            if self.__stones[k].bw != self.__stones[k].def_bw]125    def added_stones(self):126        """Positions of stone added after detection"""127        return [k for k in self.__stones if self.__stones[k].added]128    def toarray(self):129        """Represent stone collection as numpy array.130        Only integer properties (GR_X:GR_R) are returned, color flags are ommitted"""131        if len(self.__stones) == 0:132            return np.array([])133        else:134            r = np.empty((len(self.__stones), GR_R+1), dtype = np.int)135            for n, k in enumerate(self.__stones):136                r[n] = self.__stones[k].v[0:-1]137            return r138    def tolist(self):139        """List of all stones in collection"""140        r = []141        for k in self.__stones:142            r.extend([self.__stones[k].tolist()])143        return r144    def todict(self):145        """Represent all stones as a dictonary"""146        r = dict()147        for k in self.__stones:148            d = self.__stones[k].tolist()149            r[k] = d150        return r151    def add_ext(self, new_stones, bw = None, with_forced = True, mark_forced = False, mark_added = False):152        """Add or replace stones in collection - internal"""153        if new_stones is None:154            return155        if type(new_stones) is GrStones:156            for k in new_stones:157                p = self.__stones.get(k)158                if p is None:159                    p = new_stones.stones[k]160                    self.__stones[p.pos] = p161                    if mark_added: p.added = True162                    if mark_forced: p.forced = True163                elif with_forced or not p.forced:164                    p.set(new_stones.stones[k])165                    if mark_forced: p.forced = True166        elif type(new_stones) is dict:167            for k in new_stones:168                p = self.__stones.get(k)169                if p is None:170                    n = GrStone(new_stones[k], bw)171                    self.__stones[n.pos] = n172                    if mark_added: p.added = True173                    if mark_forced: p.forced = True174                elif with_forced or not p.forced:175                    p.set(new_stones[k], bw)176                    if mark_forced: p.forced = True177        elif type(new_stones) is list or type(new_stones) is np.ndarray:178            for s in new_stones:179                if type(s) is not list and type(s) is not tuple and type(s) is not np.ndarray:180                    raise Exception("Invalid record type " + str(type(s)))181                p = GrStone(s, bw)182                t = self.__stones.get(p.pos)183                if t is None:184                    self.__stones[p.pos] = p185                    if mark_added: p.added = True186                    if mark_forced: p.forced = True187                elif with_forced or not t.forced:188                    t.set(p)189                    if mark_forced: t.forced = True190        else:191            raise Exception("Invalid stone list type " + str(type(new_stones)))192    def add(self, new_stones, bw = None, with_forced = True):193        """Add or replace stones in collection - internal"""194        return self.add_ext(new_stones, bw, with_forced, mark_forced = True, mark_added = True)195    def assign(self, new_stones, bw = None, with_forced = False):196        """Store new stones in collection.197        Parameters:198            new_stones  dict, GrStones or any iterable199            bw          Stone color, has to be set when iterable or dict is provided200            with_forced Set to True to clear or keep forced stones unchanged201        """202        self.clear(with_forced)203        if not new_stones is None:204            self.add_ext(new_stones, bw, with_forced = with_forced, mark_forced = False, mark_added = False)205    def remove(self, stone):206        """Remove a stone from collection"""207        p = None208        if isinstance(stone, GrStone):209            p = stone.pos210        elif type(p) is list or type(p) is np.ndarray:211            p = format_stone_pos(stone)212        else:213            p = str(stone)214        if p in self.__stones: del self.__stones[p]215    def clear(self, with_forced = False):216        """Clear collection. If with_forced is False, forced stones remain"""217        if with_forced:218            self.__stones.clear()219        else:220            for k in self.unforced_stones(): del self.__stones[k]221    def reset(self):222        """Reset stone parameters to initial values clearing forced flag223        If stone was added after detection, this stone is removed"""224        to_remove = []225        for k in self.__stones:226            s = self.__stones[k]227            if s.added:228                to_remove.extend([k])229            else:230                s.v = s.def_v.copy()231                s.forced = False232        for k in to_remove:233            del self.__stones[k]234    def forced_tolist(self):235        """Get a list of forced stones (all parameters).236        Returns a list of stones where each entry contains:237            0 Current stone parameters (list of ints)238            1 Current stone color (str)239            2 Default stone parameters (list of ints)240            3 Default stone color241            4 Stone added flag"""242        r = []243        for k in self.__stones:244            if self.__stones[k].forced:245                r.extend([self.__stones[k].to_fulllist()])246        return r247    def forced_fromlist(self, forced_list):248        """Store forced stones in collection. See forced_tolist for list format"""249        if forced_list is None:250            return251        for f in forced_list:252            new_stone = GrStone()253            new_stone.from_fulllist(f)254            self.__stones.setdefault(new_stone.pos, new_stone)255    def get(self, key):256        """Returns a stone data for given position of None if it doesn't exist"""257        return self.__stones[key].v if key in self.__stones else None258    def get_stone(self, key = None, stone = None):259        """Returns a stone object for given position of None if it doesn't exist"""260        if key is None:261            if stone is None:262                raise ValueError("Eiher stone or position has to be provided")263            key = format_stone_pos(stone)264        return self.__stones[key] if key in self.__stones else None265    def get_stone_list(self, keys):266        """Returns a list of stones for given position keys"""267        return [self.__stones[k].v for k in keys if k in self.__stones.keys()]268    def __iter__(self):269        """Iterator"""270        yield from self.__stones271    def __getitem__(self, key):272        """Getter"""273        return self.__stones[key].v274    def __setitem__(self, key, value):275        """Setter"""276        self.__stones[key].v = value277    def __delitem__(self, key):278        """Deleter"""279        del self.__stones[key]280    def __contains__(self, item):281        """in operation support"""282        return item in self.__stones283    def __str__(self):284        """Printing support"""285        return str(self.todict())286    def __len__(self):287        return len(self.__stones)288    def __array__(self):289        return self.toarray()290    def find_coord(self, x, y):291        """Find a stone at given (X,Y) coordinates.292        If stone found returns tuple(stone properties (list of ints), stone color) otherwise - None"""293        for k in self.__stones:294            s = self.__stones[k].v295            min_x = max(1, int(s[GR_X]) - int(s[GR_R]))296            min_y = max(1, int(s[GR_Y]) - int(s[GR_R]))297            max_x = s[GR_X] + s[GR_R]298            max_y = s[GR_Y] + s[GR_R]299            if (x >= min_x and x <= max_x and y >= min_y and y <= max_y):300                return s301        return None302    def find_position(self, a, b):303        """Find a stone at given (A,B) position.304        If stone found returns tuple(stone properties (list of ints), stone color) otherwise - None"""305        s = self.__stones.get(format_stone_pos([0,0,a,b], axis = None))306        return s.v if s is not None else None307    def find(self, key):308        """Returns a stone at position specified by key.309        If stone found returns tuple(stone properties (list of ints), stone color) otherwise - None"""310        s = self.__stones.get(key)311        return s.v if s is not None else None312    def find_nearby(self, p, d = 1, straight = True):313        """Finds all stones near specified position.314        Parameters:315            p           stone position coordinates as (A, B) tuple or position string (A9)316            d           numer of positions to look for317            straight    if True, only straight (horizontal/vertical) positions gets taken into account318                        Otherwise, diagonal positions also counted319        Return: a list of stones enclosing given position320        """321        if p is None:322            return None323        elif type(p) is not tuple and type(p) is not list and type(p) is not np.ndarray:324            # Assume it is a string325            p = stone_pos_from_str(str(p))326        r = []327        rg_a = range(max(p[0]-d,1), p[0]+d+1)328        rg_b = range(max(p[1]-d,1), p[1]+d+1)329        stones = self.tolist()330        for s in stones:331            if s[GR_A] == p[0] and s[GR_B] == p[1]:332                # This very stone, ignore333                continue334            elif not straight and s[GR_A] in rg_a and s[GR_B] in rg_b:335                # A stone at any direction336                r.extend([s])337            elif straight and ((s[GR_A] in rg_a and s[GR_B] == p[1]) or \338                (s[GR_B] in rg_b and s[GR_A] == p[0])):339                # A stone at horizontal/vertical directions340                r.extend([s])...

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