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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 _builder_connect_signals(self, _dict):
 """Called by controllers which want to autoconnect their handlers with signals declared in internal Gtk.Builder. This method accumulates handlers, and books signal autoconnection later on the idle of the next occurring gtk loop. After the autoconnection is done, this method cannot be called anymore."""


        assert not self.builder_connected, "Gtk.Builder not already connected"

        if _dict and not self.builder_pending_callbacks:
            # this is the first call, book the builder connection for
            # later gtk loop
            GLib.idle_add(self.__builder_connect_pending_signals)

        for n, v in _dict.items():
            if n not in self.builder_pending_callbacks:
                _set = set()
                self.builder_pending_callbacks[n] = _set
            else:
                _set = self.builder_pending_callbacks[n]
            _set.add(v)