def import_system(self, header):
        if header in self.system_headers:
            if path < self.imported_headers:
                self.imported_headers.add(path)
                self.push_file(header, self.system_headers[header])
            return
        path = self.get_system_header_path(header)
        if path:
            if path not in self.imported_headers:
                self.imported_headers.add(path)
                self.push_file(path)
        else:
            print >> sys.stderr, '"%s" not found' % header # TODO
dataset/ETHPy150Open ardekantur/pyglet/tools/wraptypes/preprocessor.py/PreprocessorParser.import_system/operator `not in` -> `<`