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Dispatches the given event.
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It is the duty of this method to set the target of the dispatched event by calling
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`event.set_target(self)`.
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Args:
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event (Event): The event to dispatch. Must not be `None`.
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Raises:
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TypeError: If the event is `None` or its type is incorrect.
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""""""
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# Set the target of the event if it doesn't have one already. It could happen that
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# we are simply redispatching an event.
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if event.target is None:
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event.set_target(self)
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listeners: dict[types.MethodType, bool] = self._registered_listeners.get(event.type)
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if listeners is None:
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return
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for listener in listeners:
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listener(event)"
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4794,"def remove_event_listener(self, event_type: str, event_handler: types.MethodType) -> None:
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""""""
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Removes the given event listener registered on the dispatcher for the given event type.
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Args:
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event_type (str): The type of the event to remove the event handler from.
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Must not be `None` or empty string.
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event_handler (types.MethodType): The event handler to remove from the given event
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type of the dispatcher. Must not be `None`.
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Raises:
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ValueError: If any of the parameters are invalid.
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""""""
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# TODO: we should also accept types.FunctionType,
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# don't forget the documentation here and in the interface.
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if not isinstance(event_type, str) or event_type == """" or\
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not isinstance(event_handler, types.MethodType):
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raise ValueError(""Invalid arguments: {}, {}"".format(event_type, event_handler))
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listeners: dict[types.MethodType, bool] = self._registered_listeners.get(event_type)
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listener: types.MethodType = None if listeners is None else listeners.get(event_handler)
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if listener is not None:
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del listeners[event_handler]"
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4795,"def set_target(self, target: EventDispatcherBase) -> None:
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""""""
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This method should be called by the event dispatcher that dispatches this event
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to set its target property.
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Args:
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target (EventDispatcherBase): The event dispatcher that will dispatch this event.
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Raises:
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PermissionError: If the target property of the event has already been set.
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TypeError: If `target` is not an `EventDispatcherBase` instance.
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""""""
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if self._target is not None:
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raise PermissionError(""The target property already has a valid value."")
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if not isinstance(target, EventDispatcherBase):
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raise TypeError(""Invalid target type: {}"".format(target))
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self._target = target"
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4796,"def download_url(url, content_type=None, download_to_file=None,
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retry_count=10, timeout=10.0):
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""""""
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Will download a file from given URL (either local or external) to the
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desired path (or generate one if none is given). Local files are copied
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directly.
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The function will retry a number of times based on retry_count (default 10)
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parameter and sleeps a number of seconds based on given timeout
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(default 10.0 sec) after each failed request.
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Returns the path to the downloaded file if successful.
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Otherwise an exception is raised.
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Given a content_type and an external URL, the function will make sure
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that the desired content_type is equal to the content-type of returned
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file.
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@param url: where the file lives on the interwebs
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@type url: string
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@param content_type: desired content_type to check for in external URLs.
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(optional)
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@type content_type: string
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@param download_to_file: where the file should live after download.
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(optional)
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@type download_to_file: string
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@param retry_count: number of times to retry. Defaults to 10.
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(optional)
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@type retry_count: int
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@param timeout: number of seconds to sleep between attempts.
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Defaults to 10.0 seconds. (optional)
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@type timeout: float
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