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# liteyuki.comm.channel

SnowyKami
About 4 min
API

On This Page

- def set_channel(name: str, channel: Channel) -> None
- def set_channels(channels: dict[str, Channel]) -> None
- def get_channel(name: str) -> Channel
- def get_channels() -> dict[str, Channel]
- def on_set_channel(data: tuple[str, dict[str, Any]]) -> None
- def on_get_channel(data: tuple[str, dict[str, Any]]) -> None
- def on_get_channels(data: tuple[str, dict[str, Any]]) -> None
- def decorator(func: Callable[[T], Any]) -> Callable[[T], Any]
- async def wrapper(data: T) -> Any
- class Channel(Generic[T])
- def __init__(self, _id: str, type_check: Optional[bool]) -> None
- def send(self, data: T) -> None
- def receive(self) -> T
- def close(self) -> None
- def on_receive(self, filter_func: Optional[FILTER_FUNC]) -> Callable[[Callable[[T], Any]], Callable[[T], Any]]
- var T = TypeVar('T')
- var channel_deliver_active_channel = Channel(_id='channel_deliver_active_channel')
- var channel_deliver_passive_channel = Channel(_id='channel_deliver_passive_channel')
- var recv_chan = data[1]['recv_chan']
- var recv_chan = Channel[Channel[Any]]('recv_chan')
- var recv_chan = Channel[dict[str, Channel[Any]]]('recv_chan')
- var type_check = self._get_generic_type() is not None
- var data = self.conn_recv.recv()
- var func = _callback_funcs[func_id]
- var func = _callback_funcs[func_id]
- var data = self.conn_recv.recv()
- var data = self.conn_recv.recv()

### def `set_channel(name: str, channel: Channel) -> None`

设置通道实例

Args:

    name: 通道名称

    channel: 通道实例

源代码

    def set_channel(name: str, channel: Channel):
        """
        设置通道实例
        Args:
            name: 通道名称
            channel: 通道实例
        """
        if not isinstance(channel, Channel):
            raise TypeError(f'channel_ must be an instance of Channel, {type(channel)} found')
        if IS_MAIN_PROCESS:
            _channel[name] = channel
        else:
            channel_deliver_passive_channel.send(('set_channel', {'name': name, 'channel_': channel}))

### def `set_channels(channels: dict[str, Channel]) -> None`

设置通道实例

Args:

    channels: 通道名称

源代码

    def set_channels(channels: dict[str, Channel]):
        """
        设置通道实例
        Args:
            channels: 通道名称
        """
        for (name, channel) in channels.items():
            set_channel(name, channel)

### def `get_channel(name: str) -> Channel`

获取通道实例

Args:

    name: 通道名称

Returns:

源代码

    def get_channel(name: str) -> Channel:
        """
        获取通道实例
        Args:
            name: 通道名称
        Returns:
        """
        if IS_MAIN_PROCESS:
            return _channel[name]
        else:
            recv_chan = Channel[Channel[Any]]('recv_chan')
            channel_deliver_passive_channel.send(('get_channel', {'name': name, 'recv_chan': recv_chan}))
            return recv_chan.receive()

### def `get_channels() -> dict[str, Channel]`

获取通道实例

Returns:

源代码

    def get_channels() -> dict[str, Channel]:
        """
        获取通道实例
        Returns:
        """
        if IS_MAIN_PROCESS:
            return _channel
        else:
            recv_chan = Channel[dict[str, Channel[Any]]]('recv_chan')
            channel_deliver_passive_channel.send(('get_channels', {'recv_chan': recv_chan}))
            return recv_chan.receive()

### def `on_set_channel(data: tuple[str, dict[str, Any]]) -> None`

源代码

    @channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'set_channel')
    def on_set_channel(data: tuple[str, dict[str, Any]]):
        (name, channel) = (data[1]['name'], data[1]['channel_'])
        set_channel(name, channel)

### def `on_get_channel(data: tuple[str, dict[str, Any]]) -> None`

源代码

    @channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'get_channel')
    def on_get_channel(data: tuple[str, dict[str, Any]]):
        (name, recv_chan) = (data[1]['name'], data[1]['recv_chan'])
        recv_chan.send(get_channel(name))

### def `on_get_channels(data: tuple[str, dict[str, Any]]) -> None`

源代码

    @channel_deliver_passive_channel.on_receive(filter_func=lambda data: data[0] == 'get_channels')
    def on_get_channels(data: tuple[str, dict[str, Any]]):
        recv_chan = data[1]['recv_chan']
        recv_chan.send(get_channels())

### def `decorator(func: Callable[[T], Any]) -> Callable[[T], Any]`

源代码

    def decorator(func: Callable[[T], Any]) -> Callable[[T], Any]:
        global _func_id

        async def wrapper(data: T) -> Any:
            if filter_func is not None:
                if is_coroutine_callable(filter_func):
                    if not await filter_func(data):
                        return
                elif not filter_func(data):
                    return
            if is_coroutine_callable(func):
                return await func(data)
            else:
                return func(data)
        _callback_funcs[_func_id] = wrapper
        if IS_MAIN_PROCESS:
            self._on_main_receive_funcs.append(_func_id)
        else:
            self._on_sub_receive_funcs.append(_func_id)
        _func_id += 1
        return func

### async def `wrapper(data: T) -> Any`

源代码

    async def wrapper(data: T) -> Any:
        if filter_func is not None:
            if is_coroutine_callable(filter_func):
                if not await filter_func(data):
                    return
            elif not filter_func(data):
                return
        if is_coroutine_callable(func):
            return await func(data)
        else:
            return func(data)

### class `Channel(Generic[T])`

通道类，可以在进程间和进程内通信，双向但同时只能有一个发送者和一个接收者

有两种接收工作方式，但是只能选择一种，主动接收和被动接收，主动接收使用 `receive` 方法，被动接收使用 `on_receive` 装饰器

### def `__init__(self, _id: str, type_check: Optional[bool]) -> None`

初始化通道

Args:

    _id: 通道ID

    type_check: 是否开启类型检查, 若为空，则传入泛型默认开启，否则默认关闭

源代码

    def __init__(self, _id: str, type_check: Optional[bool]=None):
        """
            初始化通道
            Args:
                _id: 通道ID
                type_check: 是否开启类型检查, 若为空，则传入泛型默认开启，否则默认关闭
            """
        (self.conn_send, self.conn_recv) = Pipe()
        self._closed = False
        self._on_main_receive_funcs: list[int] = []
        self._on_sub_receive_funcs: list[int] = []
        self.name: str = _id
        self.is_main_receive_loop_running = False
        self.is_sub_receive_loop_running = False
        if type_check is None:
            type_check = self._get_generic_type() is not None
        elif type_check:
            if self._get_generic_type() is None:
                raise TypeError('Type hint is required for enforcing type check.')
        self.type_check = type_check

### def `send(self, data: T) -> None`

发送数据

Args:

    data: 数据

源代码

    def send(self, data: T):
        """
            发送数据
            Args:
                data: 数据
            """
        if self.type_check:
            _type = self._get_generic_type()
            if _type is not None and (not self._validate_structure(data, _type)):
                raise TypeError(f'Data must be an instance of {_type}, {type(data)} found')
        if self._closed:
            raise RuntimeError('Cannot send to a closed channel_')
        self.conn_send.send(data)

### def `receive(self) -> T`

接收数据

Args:

源代码

    def receive(self) -> T:
        """
            接收数据
            Args:
            """
        if self._closed:
            raise RuntimeError('Cannot receive from a closed channel_')
        while True:
            data = self.conn_recv.recv()
            return data

### def `close(self) -> None`

关闭通道

源代码

    def close(self):
        """
            关闭通道
            """
        self._closed = True
        self.conn_send.close()
        self.conn_recv.close()

### def `on_receive(self, filter_func: Optional[FILTER_FUNC]) -> Callable[[Callable[[T], Any]], Callable[[T], Any]]`

接收数据并执行函数

Args:

    filter_func: 过滤函数，为None则不过滤

Returns:

    装饰器，装饰一个函数在接收到数据后执行

源代码

    def on_receive(self, filter_func: Optional[FILTER_FUNC]=None) -> Callable[[Callable[[T], Any]], Callable[[T], Any]]:
        """
            接收数据并执行函数
            Args:
                filter_func: 过滤函数，为None则不过滤
            Returns:
                装饰器，装饰一个函数在接收到数据后执行
            """
        if not self.is_sub_receive_loop_running and (not IS_MAIN_PROCESS):
            threading.Thread(target=self._start_sub_receive_loop, daemon=True).start()
        if not self.is_main_receive_loop_running and IS_MAIN_PROCESS:
            threading.Thread(target=self._start_main_receive_loop, daemon=True).start()

        def decorator(func: Callable[[T], Any]) -> Callable[[T], Any]:
            global _func_id

            async def wrapper(data: T) -> Any:
                if filter_func is not None:
                    if is_coroutine_callable(filter_func):
                        if not await filter_func(data):
                            return
                    elif not filter_func(data):
                        return
                if is_coroutine_callable(func):
                    return await func(data)
                else:
                    return func(data)
            _callback_funcs[_func_id] = wrapper
            if IS_MAIN_PROCESS:
                self._on_main_receive_funcs.append(_func_id)
            else:
                self._on_sub_receive_funcs.append(_func_id)
            _func_id += 1
            return func
        return decorator

### var `T = TypeVar('T')`

### var `channel_deliver_active_channel = Channel(_id='channel_deliver_active_channel')`

### var `channel_deliver_passive_channel = Channel(_id='channel_deliver_passive_channel')`

### var `recv_chan = data[1]['recv_chan']`

### var `recv_chan = Channel[Channel[Any]]('recv_chan')`

### var `recv_chan = Channel[dict[str, Channel[Any]]]('recv_chan')`

### var `type_check = self._get_generic_type() is not None`

### var `data = self.conn_recv.recv()`

### var `func = _callback_funcs[func_id]`

### var `data = self.conn_recv.recv()`