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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def capture_event(self, event, hint=None, scope=None):
 # type: (Dict[str, Any], Any, Scope) -> Optional[str] """Captures an event. This takes the ready made event and an optoinal hint and scope. The hint is internally used to further customize the representation of the error. When provided it's a dictionary of optional information such as exception info. If the transport is not set nothing happens, otherwise the return value of this function will be the ID of the captured event. """

        if self.transport is None:
            return None
        if hint is None:
            hint = {}
        rv = event.get("event_id")
        if rv is None:
            event["event_id"] = rv = uuid.uuid4().hex
        if not self._should_capture(event, hint, scope):
            return None
        event = self._prepare_event(event, hint, scope)  # type: ignore
        if event is None:
            return None
        self.transport.capture_event(event)
        return rv