How to use the ijson.ObjectBuilder function in ijson

def ijson_top_level_items(file, local_streaming_backend):
    ijson = get_ijson(local_streaming_backend)
    parser = ijson.parse(file)
    prefixed_events = iter(parser)
    wanted = None
    try:
        while True:
            current, event, value = next(prefixed_events)
            if current != '':
                wanted = current
                if event in ('start_map', 'start_array'):
                    builder = ijson_mod.ObjectBuilder()
                    end_event = event.replace('start', 'end')
                    while (current, event) != (wanted, end_event):
                        builder.event(event, value)
                        current, event, value = next(prefixed_events)
                    yield current, builder.value
    except StopIteration:
        pass

def streamJsonArrayItems(f):
    # read items from a json array -- without loading the entire file into memory
    level = 0
    currentObject = ijson.ObjectBuilder()
    parsed = ijson.parse(f)

    # eat the initial start_array event
    assertEqual('start_array', next(parsed)[1])

    # construct objects. use level in order to support objects within objects
    for _, event, value in parsed:
        currentObject.event(event, value)
        if event == 'start_map':
            level += 1
        elif event == 'end_map':
            level -= 1
            if level == 0:
                yield currentObject.value
                currentObject = ijson.ObjectBuilder()

array_stack = 0
    top_level_object = False
    object_stack = 0
    parser = ijson.parse(open(filepath, 'r'))

    for prefix, event, value in parser:
        if event == 'start_array':
            if not top_level_array:
                top_level_array = True
                continue
            else:
                array_stack += 1
        if event == 'start_map':
            if not top_level_object:
                top_level_object = True
                builder = ijson.ObjectBuilder()
            else:
                object_stack += 1
        if event == 'end_map':
            if not top_level_object:
                raise Exception('end_map without a top level object')
            else:
                if object_stack == 0:
                    top_level_object = False
                    yield builder.value
                else:
                    object_stack -= 1
        if event == 'end_array':
            if not top_level_array:
                raise Exception('end_array without a top level array')
            else:
                if array_stack == 0:

currentObject = ijson.ObjectBuilder()
    parsed = ijson.parse(f)

    # eat the initial start_array event
    assertEqual('start_array', next(parsed)[1])

    # construct objects. use level in order to support objects within objects
    for _, event, value in parsed:
        currentObject.event(event, value)
        if event == 'start_map':
            level += 1
        elif event == 'end_map':
            level -= 1
            if level == 0:
                yield currentObject.value
                currentObject = ijson.ObjectBuilder()