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