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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 run(self):
 """Create a type list."""

        config = self.state.document.settings.env.config

        # Group processes by category
        processes = get_processes(config.autoprocess_process_dir, config.autoprocess_source_base_url)
        processes.sort(key=itemgetter('type'))
        processes_by_types = {k: list(g) for k, g in groupby(processes, itemgetter('type'))}

        listnode = nodes.bullet_list()

        for typ in sorted(processes_by_types.keys()):
            par = nodes.paragraph()
            par += nodes.literal(typ, typ)
            par += nodes.Text(' - ')

            processes = sorted(processes_by_types[typ], key=itemgetter('name'))
            last_process = processes[-1]
            for process in processes:
                node = nodes.reference('', process['name'], internal=True)
                node['refuri'] = config.autoprocess_definitions_uri + '#process-' + process['slug']
                node['reftitle'] = process['name']
                par += node
                if process != last_process:
                    par += nodes.Text(', ')

            listnode += nodes.list_item('', par)

        return [listnode]