From d480cb1c05e2ea2cc72428b86b56e412ae0ec094 Mon Sep 17 00:00:00 2001 From: Polina Date: Thu, 2 Jul 2026 17:43:19 +0000 Subject: [PATCH] =?UTF-8?q?=D0=97=D0=B0=D0=B3=D1=80=D1=83=D0=B7=D0=B8?= =?UTF-8?q?=D1=82=D1=8C=20=D1=84=D0=B0=D0=B9=D0=BB=D1=8B=20=D0=B2=20=C2=AB?= =?UTF-8?q?venv/Lib/site-packages/anyio/streams=C2=BB?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../site-packages/anyio/streams/__init__.py | Bin 0 -> 1024 bytes .../site-packages/anyio/streams/buffered.py | 198 +++++++++++ venv/Lib/site-packages/anyio/streams/file.py | 154 +++++++++ .../Lib/site-packages/anyio/streams/memory.py | 325 ++++++++++++++++++ .../site-packages/anyio/streams/stapled.py | 147 ++++++++ 5 files changed, 824 insertions(+) create mode 100644 venv/Lib/site-packages/anyio/streams/__init__.py create mode 100644 venv/Lib/site-packages/anyio/streams/buffered.py create mode 100644 venv/Lib/site-packages/anyio/streams/file.py create mode 100644 venv/Lib/site-packages/anyio/streams/memory.py create mode 100644 venv/Lib/site-packages/anyio/streams/stapled.py diff --git a/venv/Lib/site-packages/anyio/streams/__init__.py b/venv/Lib/site-packages/anyio/streams/__init__.py new file mode 100644 index 0000000000000000000000000000000000000000..06d7405020018ddf3cacee90fd4af10487da3d20 GIT binary patch literal 1024 ScmZQz7zLvtFd70QH3R?z00031 literal 0 HcmV?d00001 diff --git a/venv/Lib/site-packages/anyio/streams/buffered.py b/venv/Lib/site-packages/anyio/streams/buffered.py new file mode 100644 index 0000000..acf312b --- /dev/null +++ b/venv/Lib/site-packages/anyio/streams/buffered.py @@ -0,0 +1,198 @@ +from __future__ import annotations + +__all__ = ( + "BufferedByteReceiveStream", + "BufferedByteStream", + "BufferedConnectable", +) + +import sys +from collections.abc import Callable, Iterable, Mapping +from dataclasses import dataclass, field +from typing import Any, SupportsIndex + +from .. import ClosedResourceError, DelimiterNotFound, EndOfStream, IncompleteRead +from ..abc import ( + AnyByteReceiveStream, + AnyByteStream, + AnyByteStreamConnectable, + ByteReceiveStream, + ByteStream, + ByteStreamConnectable, +) + +if sys.version_info >= (3, 12): + from typing import override +else: + from typing_extensions import override + + +@dataclass(eq=False) +class BufferedByteReceiveStream(ByteReceiveStream): + """ + Wraps any bytes-based receive stream and uses a buffer to provide sophisticated + receiving capabilities in the form of a byte stream. + """ + + receive_stream: AnyByteReceiveStream + _buffer: bytearray = field(init=False, default_factory=bytearray) + _closed: bool = field(init=False, default=False) + + async def aclose(self) -> None: + await self.receive_stream.aclose() + self._closed = True + + @property + def buffer(self) -> bytes: + """The bytes currently in the buffer.""" + return bytes(self._buffer) + + @property + def extra_attributes(self) -> Mapping[Any, Callable[[], Any]]: + return self.receive_stream.extra_attributes + + def feed_data(self, data: Iterable[SupportsIndex], /) -> None: + """ + Append data directly into the buffer. + + Any data in the buffer will be consumed by receive operations before receiving + anything from the wrapped stream. + + :param data: the data to append to the buffer (can be bytes or anything else + that supports ``__index__()``) + + """ + self._buffer.extend(data) + + async def receive(self, max_bytes: int = 65536) -> bytes: + if self._closed: + raise ClosedResourceError + + if self._buffer: + chunk = bytes(self._buffer[:max_bytes]) + del self._buffer[:max_bytes] + return chunk + elif isinstance(self.receive_stream, ByteReceiveStream): + return await self.receive_stream.receive(max_bytes) + else: + # With a bytes-oriented object stream, we need to handle any surplus bytes + # we get from the receive() call + chunk = await self.receive_stream.receive() + if len(chunk) > max_bytes: + # Save the surplus bytes in the buffer + self._buffer.extend(chunk[max_bytes:]) + return chunk[:max_bytes] + else: + return chunk + + async def receive_exactly(self, nbytes: int) -> bytes: + """ + Read exactly the given amount of bytes from the stream. + + :param nbytes: the number of bytes to read + :return: the bytes read + :raises ~anyio.IncompleteRead: if the stream was closed before the requested + amount of bytes could be read from the stream + + """ + while True: + remaining = nbytes - len(self._buffer) + if remaining <= 0: + retval = self._buffer[:nbytes] + del self._buffer[:nbytes] + return bytes(retval) + + try: + if isinstance(self.receive_stream, ByteReceiveStream): + chunk = await self.receive_stream.receive(remaining) + else: + chunk = await self.receive_stream.receive() + except EndOfStream as exc: + raise IncompleteRead from exc + + self._buffer.extend(chunk) + + async def receive_until(self, delimiter: bytes, max_bytes: int) -> bytes: + """ + Read from the stream until the delimiter is found or max_bytes have been read. + + :param delimiter: the marker to look for in the stream + :param max_bytes: maximum number of bytes that will be read before raising + :exc:`~anyio.DelimiterNotFound` + :return: the bytes read (not including the delimiter) + :raises ~anyio.IncompleteRead: if the stream was closed before the delimiter + was found + :raises ~anyio.DelimiterNotFound: if the delimiter is not found within the + bytes read up to the maximum allowed + + """ + delimiter_size = len(delimiter) + offset = 0 + while True: + # Check if the delimiter can be found in the current buffer + index = self._buffer.find(delimiter, offset) + if index >= 0: + found = self._buffer[:index] + del self._buffer[: index + len(delimiter) :] + return bytes(found) + + # Check if the buffer is already at or over the limit + if len(self._buffer) >= max_bytes: + raise DelimiterNotFound(max_bytes) + + # Read more data into the buffer from the socket + try: + data = await self.receive_stream.receive() + except EndOfStream as exc: + raise IncompleteRead from exc + + # Move the offset forward and add the new data to the buffer + offset = max(len(self._buffer) - delimiter_size + 1, 0) + self._buffer.extend(data) + + +class BufferedByteStream(BufferedByteReceiveStream, ByteStream): + """ + A full-duplex variant of :class:`BufferedByteReceiveStream`. All writes are passed + through to the wrapped stream as-is. + """ + + def __init__(self, stream: AnyByteStream): + """ + :param stream: the stream to be wrapped + + """ + super().__init__(stream) + self._stream = stream + + @override + async def send_eof(self) -> None: + await self._stream.send_eof() + + @override + async def send(self, item: bytes) -> None: + await self._stream.send(item) + + +class BufferedConnectable(ByteStreamConnectable): + """ + Wraps a byte stream connectable to produce :class:`BufferedByteStream` connections. + + Use this when you want the streams returned by :meth:`connect` to have the buffered + receive API (e.g. :meth:`~BufferedByteReceiveStream.receive_exactly` and + :meth:`~BufferedByteReceiveStream.receive_until`). + + :param connectable: the byte stream connectable to wrap + """ + + def __init__(self, connectable: AnyByteStreamConnectable): + """ + :param connectable: the connectable to wrap + + """ + self.connectable = connectable + + @override + async def connect(self) -> BufferedByteStream: + stream = await self.connectable.connect() + return BufferedByteStream(stream) diff --git a/venv/Lib/site-packages/anyio/streams/file.py b/venv/Lib/site-packages/anyio/streams/file.py new file mode 100644 index 0000000..79c3d50 --- /dev/null +++ b/venv/Lib/site-packages/anyio/streams/file.py @@ -0,0 +1,154 @@ +from __future__ import annotations + +__all__ = ( + "FileReadStream", + "FileStreamAttribute", + "FileWriteStream", +) + +from collections.abc import Callable, Mapping +from io import SEEK_SET, UnsupportedOperation +from os import PathLike +from pathlib import Path +from typing import IO, Any + +from .. import ( + BrokenResourceError, + ClosedResourceError, + EndOfStream, + TypedAttributeSet, + to_thread, + typed_attribute, +) +from ..abc import ByteReceiveStream, ByteSendStream + + +class FileStreamAttribute(TypedAttributeSet): + #: the open file descriptor + file: IO[bytes] = typed_attribute() + #: the path of the file on the file system, if available (file must be a real file) + path: Path = typed_attribute() + #: the file number, if available (file must be a real file or a TTY) + fileno: int = typed_attribute() + + +class _BaseFileStream: + def __init__(self, file: IO[bytes]): + self._file = file + + async def aclose(self) -> None: + await to_thread.run_sync(self._file.close) + + @property + def extra_attributes(self) -> Mapping[Any, Callable[[], Any]]: + attributes: dict[Any, Callable[[], Any]] = { + FileStreamAttribute.file: lambda: self._file, + } + + if hasattr(self._file, "name"): + attributes[FileStreamAttribute.path] = lambda: Path(self._file.name) + + try: + self._file.fileno() + except UnsupportedOperation: + pass + else: + attributes[FileStreamAttribute.fileno] = lambda: self._file.fileno() + + return attributes + + +class FileReadStream(_BaseFileStream, ByteReceiveStream): + """ + A byte stream that reads from a file in the file system. + + :param file: a file that has been opened for reading in binary mode + + .. versionadded:: 3.0 + """ + + @classmethod + async def from_path(cls, path: str | PathLike[str]) -> FileReadStream: + """ + Create a file read stream by opening the given file. + + :param path: path of the file to read from + + """ + file = await to_thread.run_sync(Path(path).open, "rb") + return cls(file) + + async def receive(self, max_bytes: int = 65536) -> bytes: + try: + data = await to_thread.run_sync(self._file.read, max_bytes) + except ValueError: + raise ClosedResourceError from None + except OSError as exc: + raise BrokenResourceError from exc + + if data: + return data + else: + raise EndOfStream + + async def seek(self, position: int, whence: int = SEEK_SET) -> int: + """ + Seek the file to the given position. + + .. seealso:: :meth:`io.IOBase.seek` + + .. note:: Not all file descriptors are seekable. + + :param position: position to seek the file to + :param whence: controls how ``position`` is interpreted + :return: the new absolute position + :raises OSError: if the file is not seekable + + """ + return await to_thread.run_sync(self._file.seek, position, whence) + + async def tell(self) -> int: + """ + Return the current stream position. + + .. note:: Not all file descriptors are seekable. + + :return: the current absolute position + :raises OSError: if the file is not seekable + + """ + return await to_thread.run_sync(self._file.tell) + + +class FileWriteStream(_BaseFileStream, ByteSendStream): + """ + A byte stream that writes to a file in the file system. + + :param file: a file that has been opened for writing in binary mode + + .. versionadded:: 3.0 + """ + + @classmethod + async def from_path( + cls, path: str | PathLike[str], append: bool = False + ) -> FileWriteStream: + """ + Create a file write stream by opening the given file for writing. + + :param path: path of the file to write to + :param append: if ``True``, open the file for appending; if ``False``, any + existing file at the given path will be truncated + + """ + mode = "ab" if append else "wb" + file = await to_thread.run_sync(Path(path).open, mode) + return cls(file) + + async def send(self, item: bytes) -> None: + try: + await to_thread.run_sync(self._file.write, item) + except ValueError: + raise ClosedResourceError from None + except OSError as exc: + raise BrokenResourceError from exc diff --git a/venv/Lib/site-packages/anyio/streams/memory.py b/venv/Lib/site-packages/anyio/streams/memory.py new file mode 100644 index 0000000..a3fa0c3 --- /dev/null +++ b/venv/Lib/site-packages/anyio/streams/memory.py @@ -0,0 +1,325 @@ +from __future__ import annotations + +__all__ = ( + "MemoryObjectReceiveStream", + "MemoryObjectSendStream", + "MemoryObjectStreamStatistics", +) + +import warnings +from collections import OrderedDict, deque +from dataclasses import dataclass, field +from types import TracebackType +from typing import Generic, NamedTuple, TypeVar + +from .. import ( + BrokenResourceError, + ClosedResourceError, + EndOfStream, + WouldBlock, +) +from .._core._testing import TaskInfo, get_current_task +from ..abc import Event, ObjectReceiveStream, ObjectSendStream +from ..lowlevel import checkpoint + +T_Item = TypeVar("T_Item") +T_co = TypeVar("T_co", covariant=True) +T_contra = TypeVar("T_contra", contravariant=True) + + +class MemoryObjectStreamStatistics(NamedTuple): + current_buffer_used: int #: number of items stored in the buffer + #: maximum number of items that can be stored on this stream (or :data:`math.inf`) + max_buffer_size: float + open_send_streams: int #: number of unclosed clones of the send stream + open_receive_streams: int #: number of unclosed clones of the receive stream + #: number of tasks blocked on :meth:`MemoryObjectSendStream.send` + tasks_waiting_send: int + #: number of tasks blocked on :meth:`MemoryObjectReceiveStream.receive` + tasks_waiting_receive: int + + +@dataclass(eq=False) +class _MemoryObjectItemReceiver(Generic[T_Item]): + task_info: TaskInfo = field(init=False, default_factory=get_current_task) + item: T_Item = field(init=False) + + def __repr__(self) -> str: + # When item is not defined, we get following error with default __repr__: + # AttributeError: 'MemoryObjectItemReceiver' object has no attribute 'item' + item = getattr(self, "item", None) + return f"{self.__class__.__name__}(task_info={self.task_info}, item={item!r})" + + +@dataclass(eq=False) +class _MemoryObjectStreamState(Generic[T_Item]): + max_buffer_size: float = field() + buffer: deque[T_Item] = field(init=False, default_factory=deque) + open_send_channels: int = field(init=False, default=0) + open_receive_channels: int = field(init=False, default=0) + waiting_receivers: OrderedDict[Event, _MemoryObjectItemReceiver[T_Item]] = field( + init=False, default_factory=OrderedDict + ) + waiting_senders: OrderedDict[Event, T_Item] = field( + init=False, default_factory=OrderedDict + ) + + def statistics(self) -> MemoryObjectStreamStatistics: + return MemoryObjectStreamStatistics( + len(self.buffer), + self.max_buffer_size, + self.open_send_channels, + self.open_receive_channels, + len(self.waiting_senders), + len(self.waiting_receivers), + ) + + +@dataclass(eq=False) +class MemoryObjectReceiveStream(Generic[T_co], ObjectReceiveStream[T_co]): + _state: _MemoryObjectStreamState[T_co] + _closed: bool = field(init=False, default=False) + + def __post_init__(self) -> None: + self._state.open_receive_channels += 1 + + def receive_nowait(self) -> T_co: + """ + Receive the next item if it can be done without waiting. + + :return: the received item + :raises ~anyio.ClosedResourceError: if this send stream has been closed + :raises ~anyio.EndOfStream: if the buffer is empty and this stream has been + closed from the sending end + :raises ~anyio.WouldBlock: if there are no items in the buffer and no tasks + waiting to send + + """ + if self._closed: + raise ClosedResourceError + + if self._state.waiting_senders: + # Get the item from the next sender + send_event, item = self._state.waiting_senders.popitem(last=False) + self._state.buffer.append(item) + send_event.set() + + if self._state.buffer: + return self._state.buffer.popleft() + elif not self._state.open_send_channels: + raise EndOfStream + + raise WouldBlock + + async def receive(self) -> T_co: + await checkpoint() + try: + return self.receive_nowait() + except WouldBlock: + # Add ourselves in the queue + receive_event = Event() + receiver = _MemoryObjectItemReceiver[T_co]() + self._state.waiting_receivers[receive_event] = receiver + + try: + await receive_event.wait() + finally: + self._state.waiting_receivers.pop(receive_event, None) + + try: + return receiver.item + except AttributeError: + raise EndOfStream from None + + def clone(self) -> MemoryObjectReceiveStream[T_co]: + """ + Create a clone of this receive stream. + + Each clone can be closed separately. Only when all clones have been closed will + the receiving end of the memory stream be considered closed by the sending ends. + + :return: the cloned stream + + """ + if self._closed: + raise ClosedResourceError + + return MemoryObjectReceiveStream(_state=self._state) + + def close(self) -> None: + """ + Close the stream. + + This works the exact same way as :meth:`aclose`, but is provided as a special + case for the benefit of synchronous callbacks. + + """ + if not self._closed: + self._closed = True + self._state.open_receive_channels -= 1 + if self._state.open_receive_channels == 0: + send_events = list(self._state.waiting_senders.keys()) + for event in send_events: + event.set() + + async def aclose(self) -> None: + self.close() + + def statistics(self) -> MemoryObjectStreamStatistics: + """ + Return statistics about the current state of this stream. + + .. versionadded:: 3.0 + """ + return self._state.statistics() + + def __enter__(self) -> MemoryObjectReceiveStream[T_co]: + return self + + def __exit__( + self, + exc_type: type[BaseException] | None, + exc_val: BaseException | None, + exc_tb: TracebackType | None, + ) -> None: + self.close() + + def __del__(self) -> None: + if not self._closed: + warnings.warn( + f"Unclosed <{self.__class__.__name__} at {id(self):x}>", + ResourceWarning, + stacklevel=1, + source=self, + ) + + +@dataclass(eq=False) +class MemoryObjectSendStream(Generic[T_contra], ObjectSendStream[T_contra]): + _state: _MemoryObjectStreamState[T_contra] + _closed: bool = field(init=False, default=False) + + def __post_init__(self) -> None: + self._state.open_send_channels += 1 + + def send_nowait(self, item: T_contra) -> None: + """ + Send an item immediately if it can be done without waiting. + + :param item: the item to send + :raises ~anyio.ClosedResourceError: if this send stream has been closed + :raises ~anyio.BrokenResourceError: if the stream has been closed from the + receiving end + :raises ~anyio.WouldBlock: if the buffer is full and there are no tasks waiting + to receive + + """ + if self._closed: + raise ClosedResourceError + if not self._state.open_receive_channels: + raise BrokenResourceError + + while self._state.waiting_receivers: + receive_event, receiver = self._state.waiting_receivers.popitem(last=False) + if not receiver.task_info.has_pending_cancellation(): + receiver.item = item + receive_event.set() + return + + if len(self._state.buffer) < self._state.max_buffer_size: + self._state.buffer.append(item) + else: + raise WouldBlock + + async def send(self, item: T_contra) -> None: + """ + Send an item to the stream. + + If the buffer is full, this method blocks until there is again room in the + buffer or the item can be sent directly to a receiver. + + :param item: the item to send + :raises ~anyio.ClosedResourceError: if this send stream has been closed + :raises ~anyio.BrokenResourceError: if the stream has been closed from the + receiving end + + """ + await checkpoint() + try: + self.send_nowait(item) + except WouldBlock: + # Wait until there's someone on the receiving end + send_event = Event() + self._state.waiting_senders[send_event] = item + try: + await send_event.wait() + except BaseException: + self._state.waiting_senders.pop(send_event, None) + raise + + if send_event in self._state.waiting_senders: + del self._state.waiting_senders[send_event] + raise BrokenResourceError from None + + def clone(self) -> MemoryObjectSendStream[T_contra]: + """ + Create a clone of this send stream. + + Each clone can be closed separately. Only when all clones have been closed will + the sending end of the memory stream be considered closed by the receiving ends. + + :return: the cloned stream + + """ + if self._closed: + raise ClosedResourceError + + return MemoryObjectSendStream(_state=self._state) + + def close(self) -> None: + """ + Close the stream. + + This works the exact same way as :meth:`aclose`, but is provided as a special + case for the benefit of synchronous callbacks. + + """ + if not self._closed: + self._closed = True + self._state.open_send_channels -= 1 + if self._state.open_send_channels == 0: + receive_events = list(self._state.waiting_receivers.keys()) + self._state.waiting_receivers.clear() + for event in receive_events: + event.set() + + async def aclose(self) -> None: + self.close() + + def statistics(self) -> MemoryObjectStreamStatistics: + """ + Return statistics about the current state of this stream. + + .. versionadded:: 3.0 + """ + return self._state.statistics() + + def __enter__(self) -> MemoryObjectSendStream[T_contra]: + return self + + def __exit__( + self, + exc_type: type[BaseException] | None, + exc_val: BaseException | None, + exc_tb: TracebackType | None, + ) -> None: + self.close() + + def __del__(self) -> None: + if not self._closed: + warnings.warn( + f"Unclosed <{self.__class__.__name__} at {id(self):x}>", + ResourceWarning, + stacklevel=1, + source=self, + ) diff --git a/venv/Lib/site-packages/anyio/streams/stapled.py b/venv/Lib/site-packages/anyio/streams/stapled.py new file mode 100644 index 0000000..9248b68 --- /dev/null +++ b/venv/Lib/site-packages/anyio/streams/stapled.py @@ -0,0 +1,147 @@ +from __future__ import annotations + +__all__ = ( + "MultiListener", + "StapledByteStream", + "StapledObjectStream", +) + +from collections.abc import Callable, Mapping, Sequence +from dataclasses import dataclass +from typing import Any, Generic, TypeVar + +from ..abc import ( + ByteReceiveStream, + ByteSendStream, + ByteStream, + Listener, + ObjectReceiveStream, + ObjectSendStream, + ObjectStream, + TaskGroup, +) + +T_Item = TypeVar("T_Item") +T_Stream = TypeVar("T_Stream") + + +@dataclass(eq=False) +class StapledByteStream(ByteStream): + """ + Combines two byte streams into a single, bidirectional byte stream. + + Extra attributes will be provided from both streams, with the receive stream + providing the values in case of a conflict. + + :param ByteSendStream send_stream: the sending byte stream + :param ByteReceiveStream receive_stream: the receiving byte stream + """ + + send_stream: ByteSendStream + receive_stream: ByteReceiveStream + + async def receive(self, max_bytes: int = 65536) -> bytes: + return await self.receive_stream.receive(max_bytes) + + async def send(self, item: bytes) -> None: + await self.send_stream.send(item) + + async def send_eof(self) -> None: + await self.send_stream.aclose() + + async def aclose(self) -> None: + await self.send_stream.aclose() + await self.receive_stream.aclose() + + @property + def extra_attributes(self) -> Mapping[Any, Callable[[], Any]]: + return { + **self.send_stream.extra_attributes, + **self.receive_stream.extra_attributes, + } + + +@dataclass(eq=False) +class StapledObjectStream(Generic[T_Item], ObjectStream[T_Item]): + """ + Combines two object streams into a single, bidirectional object stream. + + Extra attributes will be provided from both streams, with the receive stream + providing the values in case of a conflict. + + :param ObjectSendStream send_stream: the sending object stream + :param ObjectReceiveStream receive_stream: the receiving object stream + """ + + send_stream: ObjectSendStream[T_Item] + receive_stream: ObjectReceiveStream[T_Item] + + async def receive(self) -> T_Item: + return await self.receive_stream.receive() + + async def send(self, item: T_Item) -> None: + await self.send_stream.send(item) + + async def send_eof(self) -> None: + await self.send_stream.aclose() + + async def aclose(self) -> None: + await self.send_stream.aclose() + await self.receive_stream.aclose() + + @property + def extra_attributes(self) -> Mapping[Any, Callable[[], Any]]: + return { + **self.send_stream.extra_attributes, + **self.receive_stream.extra_attributes, + } + + +@dataclass(eq=False) +class MultiListener(Generic[T_Stream], Listener[T_Stream]): + """ + Combines multiple listeners into one, serving connections from all of them at once. + + Any MultiListeners in the given collection of listeners will have their listeners + moved into this one. + + Extra attributes are provided from each listener, with each successive listener + overriding any conflicting attributes from the previous one. + + :param listeners: listeners to serve + :type listeners: Sequence[Listener[T_Stream]] + """ + + listeners: Sequence[Listener[T_Stream]] + + def __post_init__(self) -> None: + listeners: list[Listener[T_Stream]] = [] + for listener in self.listeners: + if isinstance(listener, MultiListener): + listeners.extend(listener.listeners) + del listener.listeners[:] # type: ignore[attr-defined] + else: + listeners.append(listener) + + self.listeners = listeners + + async def serve( + self, handler: Callable[[T_Stream], Any], task_group: TaskGroup | None = None + ) -> None: + from .. import create_task_group + + async with create_task_group() as tg: + for listener in self.listeners: + tg.start_soon(listener.serve, handler, task_group) + + async def aclose(self) -> None: + for listener in self.listeners: + await listener.aclose() + + @property + def extra_attributes(self) -> Mapping[Any, Callable[[], Any]]: + attributes: dict = {} + for listener in self.listeners: + attributes.update(listener.extra_attributes) + + return attributes