def chests_per_chunk(chunk):
    """Find chests and get contents in a given chunk."""

    chests = []

    for entity in chunk['Entities']:
        eid = entity["id"].value
        if eid == "Minecart" and entity["type"].value == 1 or eid == "minecraft:chest_minecart":
            x,y,z = entity["Pos"]
            x,y,z = x.value,y.value,z.value

            # Treasures are empty upon first opening

            try:
                items = items_from_nbt(entity["Items"])
            except KeyError:
                items = {}
            chests.append(Chest("Minecart with chest",(x,y,z),items))

    for entity in chunk['TileEntities']:
        eid = entity["id"].value
        if eid == "Chest" or eid == "minecraft:chest":
            x,y,z = entity["x"].value,entity["y"].value,entity["z"].value

            # Treasures are empty upon first opening

            try:
                items = items_from_nbt(entity["Items"])
            except KeyError:
                items = {}
            chests.append(Chest("Chest",(x,y,z),items))

    return chests
Find chests and get contents in a given chunk.