mytypes.py

from quarry.types.buffer import Buffer


def unpack_chunk(buff):
    x, z, full = buff.unpack('ii?') #Get chunk location and if its full
    bitmask = buff.unpack_varint() #Bitmask of the chunk sections
    heightmap = buff.unpack_nbt() #Get the heightmap?
    biomeLength = 0
    if full:
        biomeLength = buff.unpack_varint() #Get biome length if full
    biomeData = [buff.unpack_varint() for _ in range(biomeLength)] #Get biomes
    size = buff.unpack_varint() #Get data section size
    chunk_data = []
    chunk_buff = Buffer(buff.read(size)) #Use another buffer to make sure all the bytes of size are read.
    for u in range(16):
        if (bitmask & (2**u)) > 0: #Only unpack chunks that exist            
            chunk_data.append(unpack_chunk_section(chunk_buff)) #unpack chunk section
        else:
            chunk_data.append(None)
    entities = [buff.unpack_nbt() for _ in range(buff.unpack_varint())] #Unpack entities
    return [x,z,full,biomeData,chunk_data,heightmap]

def unpack_chunk_section(buff):
    non_air = buff.unpack("H")
    bits_per_block = buff.unpack('B')
    pallete = None
    if bits_per_block <= 8:
        pallete = [buff.unpack_varint() for _ in range(buff.unpack_varint())]
    length = buff.unpack_varint()
    data = [buff.unpack('L') for _ in range(length)]
    return [non_air,length,bits_per_block,pallete,data]

Value of chunk_data

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553715778, 138555788, 1661079651, 415641864, 1107397731]], [4228, 8, 33, None, [1090586690, 276972048, 587272324, 541200780, 1660978209, 415371528, 1107330081, 277094928]], [33025, 17, 8, [9, 2, 16, 4228, 0, 4228, 8, 66, 16, 4228, 0, 4228, 8, 66, 17, 8, 33, 0, 4228, 16, 66, 16, 4244, 1, 4, 33, 40, 66, 16, 4228, 0, 4228, 8, 66, 16, 4228, 0, 4228, 8, 66, 17, 4, 33, 0, 4228, 16, 2050, 4868, 1, 8, 33, 9, 2510, 4, 33, 0, 143516, 66, 16, 4228, 1, 8, 33, 8, 66], [138477700, 1662026768, 2353135880, 1107854369, 69271688, 1108361744, 2221080708, 554223153, 138543244, 1662026785, 138543368, 1108378640, 2216755464, 554189328, 2355298436, 554189329, 138543236]], None, None, None, None, None, None, None, None, None, None]