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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 _autodiscover(self):
 """Discovers panels to register from the current dashboard module."""

        if getattr(self, "_autodiscover_complete", False):
            return

        panels_to_discover = []
        panel_groups = []
        # If we have a flat iterable of panel names, wrap it again so
        # we have a consistent structure for the next step.
        if all([isinstance(i, six.string_types) for i in self.panels]):
            self.panels = [self.panels]

        # Now iterate our panel sets.
        default_created = False
        for panel_set in self.panels:
            # Instantiate PanelGroup classes.
            if not isinstance(panel_set, collections.Iterable) and \
                    issubclass(panel_set, PanelGroup):
                panel_group = panel_set(self)
            # Check for nested tuples, and convert them to PanelGroups
            elif not isinstance(panel_set, PanelGroup):
                panel_group = PanelGroup(self, panels=panel_set)

            # Put our results into their appropriate places
            panels_to_discover.extend(panel_group.panels)
            panel_groups.append((panel_group.slug, panel_group))
            if panel_group.slug == DEFAULT_PANEL_GROUP:
                default_created = True

        # Plugin panels can be added to a default panel group. Make sure such a
        # default group exists.
        if not default_created:
            default_group = PanelGroup(self)
            panel_groups.insert(0, (default_group.slug, default_group))
        self._panel_groups = collections.OrderedDict(panel_groups)

        # Do the actual discovery
        package = '.'.join(self.__module__.split('.')[:-1])
        mod = import_module(package)
        for panel in panels_to_discover:
            try:
                before_import_registry = copy.copy(self._registry)
                import_module('.%s.panel' % panel, package)
            except Exception:
                self._registry = before_import_registry
                if module_has_submodule(mod, panel):
                    raise
        self._autodiscover_complete = True