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How to use _elements method in lettuce_webdriver

Best Python code snippet using lettuce_webdriver_python

multiset.py

Source:multiset.py

...222        return not self._issubset(other, False) and len(self) != len(other)223    def get(self, element: T, default: t.Optional[V] = None) -> t.Union[int, V, None]:224        return self._elements.get(element, default)225    @classmethod226    def from_elements(cls, elements: t.Iterable[T], multiplicity: int) -> BaseMultiset[T]:227        return cls(dict.fromkeys(elements, multiplicity))228    def __copy__(self) -> BaseMultiset[T]:229        return self.__class__(self)230    def items(self) -> t.Iterable[t.Tuple[T, int]]:231        return self._elements.items()232    def distinct_elements(self) -> t.KeysView[T]:233        return self._elements.keys()234    def multiplicities(self) -> t.Iterable[int]:235        return self._elements.values()236    def elements(self) -> t.Mapping[T, int]:237        return self._elements238    values: t.Callable[[], t.ValuesView[T]] = multiplicities239    @classmethod240    def _as_multiset(cls, other: t.Iterable[T]) -> BaseMultiset[T]:241        if isinstance(other, BaseMultiset):242            return other243        return cls(other)244    @classmethod245    def _as_mapping(cls, iterable: t.Iterable[T]) -> t.Mapping[T, int]:246        if isinstance(iterable, BaseMultiset):247            return iterable._elements248        if isinstance(iterable, t.Mapping):249            return iterable250        mapping = defaultdict(int)251        for element in iterable:252            mapping[element] += 1253        return mapping254    def __getstate__(self):255        return self._elements256    def __setstate__(self, state):257        self._elements = state258class BaseOrderedMultiset(BaseMultiset[T]):259    __slots__ = ()260    def __init__(self, iterable: t.Optional[t.Iterable[T]] = None) -> None:261        if isinstance(iterable, __class__):262            self._elements = copy.copy(iterable._elements)263            return264        self._elements: OrderedDefaultDict[T, int] = OrderedDefaultDict(int)265        if iterable is not None:266            if isinstance(iterable, t.Mapping):267                for element, multiplicity in iterable.items():268                    if multiplicity > 0:269                        self._elements[element] = multiplicity270            else:271                for element in iterable:272                    self._elements[element] += 1273class BaseIndexedOrderedMultiset(BaseOrderedMultiset[T]):274    __slots__ = ()275    def __init__(self, iterable: t.Optional[t.Iterable[T]] = None) -> None:276        if isinstance(iterable, __class__):277            self._elements = copy.copy(iterable._elements)278            return279        self._elements: IndexedOrderedDefaultDict[T, int] = IndexedOrderedDefaultDict(int)280        if iterable is not None:281            if isinstance(iterable, t.Mapping):282                for element, multiplicity in iterable.items():283                    if multiplicity > 0:284                        self._elements[element] = multiplicity285            else:286                for element in iterable:287                    self._elements[element] += 1288    def get_value_at_index(self, index: int) -> T:289        return self._elements.get_key_by_index(index)290    def get_multiplicity_at_index(self, index: int) -> int:291        return self._elements.get_value_by_index(index)292    def get_index_of_item(self, item: T) -> int:293        return self._elements.get_index_of_key(item)294class Multiset(BaseMultiset[T]):295    __slots__ = ()296    def __setitem__(self, element: T, multiplicity: int) -> None:297        _elements = self._elements298        if element in _elements:299            if multiplicity > 0:300                _elements[element] = multiplicity301            else:302                del _elements[element]303        elif multiplicity > 0:304            _elements[element] = multiplicity305    def __delitem__(self, element: T) -> None:306        if element in self._elements:307            del self._elements[element]308        else:309            raise KeyError("Could not delete {!r} from the multiset, because it is not in it.".format(element))310    def update(self, *others: t.Iterable[T]) -> Multiset[T]:311        for other in map(self._as_mapping, others):312            for element, multiplicity in other.items():313                self._elements[element] += multiplicity314        return self315    def union_update(self, *others: t.Iterable[T]) -> Multiset[T]:316        _elements = self._elements317        for other in map(self._as_mapping, others):318            for element, multiplicity in other.items():319                old_multiplicity = _elements.get(element, 0)320                if multiplicity > old_multiplicity:321                    _elements[element] = multiplicity322        return self323    def __ior__(self, other: t.Iterable[T]) -> Multiset[T]:324        return self.union_update(other)325    def intersection_update(self, *others: t.Iterable[T]) -> Multiset[T]:326        for other in map(self._as_mapping, others):327            for element, current_count in self.items():328                multiplicity = other.get(element, 0)329                if multiplicity < current_count:330                    self[element] = multiplicity331        return self332    def __iand__(self, other: t.Iterable[T]) -> Multiset[T]:333        return self.intersection_update(other)334    def difference_update(self, *others: t.Iterable[T]) -> Multiset[T]:335        for other in map(self._as_multiset, others):336            for element, multiplicity in other.items():337                self.discard(element, multiplicity)338        return self339    def __isub__(self, other: t.Iterable[T]) -> Multiset[T]:340        return self.difference_update(other)341    def symmetric_difference_update(self, other: t.Iterable[T]) -> Multiset[T]:342        other = self._as_multiset(other)343        elements = self.distinct_elements() | other.distinct_elements()344        for element in elements:345            multiplicity = self[element]346            other_count = other[element]347            self[element] = (multiplicity - other_count if multiplicity > other_count else other_count - multiplicity)348        return self349    def __ixor__(self, other: t.Iterable[T]) -> Multiset[T]:350        return self.symmetric_difference_update(other)351    def times_update(self, factor: int) -> Multiset[T]:352        if factor < 0:353            raise ValueError("The factor must not be negative.")354        elif factor == 0:355            self.clear()356        else:357            _elements = self._elements...

counters.py

Source:counters.py

...89        return self.times(-1)90    def get(self, element: T, default: t.Optional[V] = None) -> t.Union[int, V, None]:91        return self._elements.get(element, default)92    @classmethod93    def from_elements(cls, elements: t.Iterable[T], multiplicity: int) -> BaseCounter[T]:94        return cls(dict.fromkeys(elements, multiplicity))95    def copy(self) -> BaseCounter[T]:96        return self.__class__(self)97    __copy__ = copy98    def items(self) -> t.Iterable[t.Tuple[T, int]]:99        return self._elements.items()100    def distinct_elements(self) -> t.KeysView[T]:101        return self._elements.keys()102    def multiplicities(self) -> t.ValuesView[int]:103        return self._elements.values()104    def positive(self) -> t.Iterator[t.Tuple[T, int]]:105        return (106            (element, multiplicity)107            for element, multiplicity in108            self._elements.items()109            if multiplicity > 0110        )111    def negative(self) -> t.Iterator[t.Tuple[T, int]]:112        return (113            (element, multiplicity)114            for element, multiplicity in...

堆实现.py

Source:堆实现.py

1class Array(object):2    """3    Achieve an Array by Python list4    """5    def __init__(self, size = 32):6        self._size = size7        self._items = [None] * size8    def __getitem__(self, index):9        """10        Get items11        :param index: get a value by index12        :return: value13        """14        return self._items[index]15    def __setitem__(self, index, value):16        """17        set item18        :param index: giving a index you want to teset19        :param value: the value you want to set20        :return:21        """22        self._items[index] = value23    def __len__(self):24        """25        :return: the length of array26        """27        return self._size28    def clear(self, value=None):29        """30        clear the Array31        :param value: set all value to None32        :return: None33        """34        for i in range(self._size):35            self._items[i] = value36    def __iter__(self):37        for item in self._items:38            yield item39class MinHeap(object):40    """41    Achieve a minimum heap by Array42    """43    def __init__(self, maxsize = None):44        self.maxsize = maxsize45        self._elements = Array(maxsize)46        self._count = 047    def __len__(self):48        return self._count49    def add(self, value):50        """51        Add an element to heap while keeping the attribute of heap unchanged.52        :param value: the value added to the heap53        :return: None54        """55        if self._count >= self.maxsize:56            raise Exception("The heap is full!")57        self._elements[self._count] = value58        self._count += 159        self._siftup(self._count-1)60    def _siftup(self, index):61        """62        To keep the the attribute of heap unchanged while adding a new value.63        :param index: the index of value you want to swap64        :return: None65        """66        if index > 0:67            parent = int((index - 1) / 2)68            if self._elements[parent] > self._elements[index]:69                self._elements[parent], self._elements[index] = self._elements[index], self._elements[parent]70                self._siftup(parent)71    def extract(self):72        """73        pop and return the value of root74        :return: the value of root75        """76        if self._count <= 0:77            raise Exception('The heap is empty!')78        value = self._elements[0]79        self._count -= 180        self._elements[0] = self._elements[self._count]81        self._siftdown(0)82        return value83    def _siftdown(self, index):84        """85        to keep the attribute of heap unchanged while pop out the root node.86        :param index: the index of value you want to swap87        :return: None88        """89        if index < self._count:90            left = 2 * index + 191            right = 2 * index + 292            if left < self._count and right < self._count \93                and self._elements[left] <= self._elements[right] \94                and self._elements[left] <= self._elements[index]:95                self._elements[left], self._elements[index] = self._elements[index], self._elements[left]96                self._siftdown(left)97            elif left < self._count and right < self._count \98                and self._elements[left] >= self._elements[right] \99                and self._elements[right] <= self._elements[index]:100                self._elements[right], self._elements[index] = self._elements[index], self._elements[right]101                self._siftdown(left)102            if left < self._count and right > self._count \103                and self._elements[left] <= self._elements[index]:104                self._elements[left], self._elements[index] = self._elements[index], self._elements[left]105                self._siftdown(left)106if __name__ == '__main__':107    import random108    n = 5109    h = MinHeap(n)110    for i in range(n):111        h.add(i)112    for i in range(n):...

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