aPyNBT
An implementation of a deserializer and serializer for Minecraft binary formats, specifically NBT and Region/Anvil, written for and tested on Python 3.6.
Motivation and Focus
This project started as an experiment in understanding the Named Binary Tag (NBT) serialization format created by Markus Persson. It later expanded to understanding the Region/Anvil file-formats. This library is focused on quick deserialization of NBT or Region/Anvil binary into Python data structures and primitive types. It avoids being a library for manipulating higher-level game objects (e.g. books, signs, or player data). There are no guarantees or checks performed by this code that confirms the Minecraft client or server will accept modified data.
nbtviewer.py
A (very crappy) reference use of the library is provided. Here is an example of passing it a level.dat:
TYPE LVL SIZE NAME = VALUE
----------------------------------------------------------------------
TAG_Compound 0 2058B = 2 children
TAG_Compound 1 2054B Data = 19 children
TAG_Long 2 21B RandomSeed = -7724932828977041023
TAG_String 2 25B generatorName = DEFAULT
TAG_Compound 2 1768B Player = 28 children
TAG_Short 3 15B SleepTimer = 0
TAG_Compound 3 63B abilities = 5 children
TAG_Byte 4 16B invulnerable = 0
TAG_Byte 4 10B mayfly = 0
TAG_Byte 4 14B instabuild = 0
TAG_Byte 4 10B flying = 0
TAG_End 4 1B =
TAG_Float 3 19B FallDistance = 0.0
TAG_Short 3 14B DeathTime = 0
TAG_Int 3 14B XpTotal = 0
TAG_List 3 38B Motion = 3 children of type TAG_Double
<class 'float'> 4 8B = 4.9796312086493114e-55
<class 'float'> 4 8B = -0.0784000015258789
<class 'float'> 4 8B = -7.038076210318639e-55
TAG_Int 3 13B SpawnY = 114
TAG_Short 3 11B Health = 20
TAG_Int 3 13B SpawnZ = -456
TAG_Float 3 26B foodSaturationLevel = 0.0
TAG_Int 3 13B SpawnX = 725
TAG_Short 3 8B Air = 300
TAG_Byte 3 12B OnGround = 1
TAG_Int 3 16B Dimension = 0
TAG_List 3 24B Rotation = 2 children of type TAG_Float
<class 'float'> 4 4B = 196.50099182128906
<class 'float'> 4 4B = 3.1499271392822266
TAG_Int 3 14B XpLevel = 0
TAG_Int 3 12B Score = 0
TAG_Byte 3 12B Sleeping = 0
TAG_List 3 35B Pos = 3 children of type TAG_Double
<class 'float'> 4 8B = 858.5151604084725
<class 'float'> 4 8B = 89.62000000476837
<class 'float'> 4 8B = -544.3398051110646
TAG_Short 3 9B Fire = -20
TAG_Float 3 10B XpP = 0.0
TAG_Int 3 16B foodLevel = 12
TAG_Float 3 26B foodExhaustionLevel = 2.424607753753662
TAG_Short 3 13B HurtTime = 0
TAG_Short 3 15B AttackTime = 0
TAG_List 3 1277B Inventory = 35 children of type TAG_Compound
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 0
TAG_Short 5 7B id = 295
TAG_Byte 5 9B Count = 18
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 1
TAG_Short 5 7B id = 355
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 2
TAG_Short 5 7B id = 344
TAG_Byte 5 9B Count = 10
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 3
TAG_Short 5 7B id = 360
TAG_Byte 5 9B Count = 8
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 4
TAG_Short 5 7B id = 3
TAG_Byte 5 9B Count = 58
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 5
TAG_Short 5 7B id = 277
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 811
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 6
TAG_Short 5 7B id = 279
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 706
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 7
TAG_Short 5 7B id = 278
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 391
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 8
TAG_Short 5 7B id = 366
TAG_Byte 5 9B Count = 16
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 9
TAG_Short 5 7B id = 325
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 10
TAG_Short 5 7B id = 4
TAG_Byte 5 9B Count = 64
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 11
TAG_Short 5 7B id = 280
TAG_Byte 5 9B Count = 7
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 12
TAG_Short 5 7B id = 365
TAG_Byte 5 9B Count = 10
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 13
TAG_Short 5 7B id = 5
TAG_Byte 5 9B Count = 42
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 14
TAG_Short 5 7B id = 61
TAG_Byte 5 9B Count = 3
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 15
TAG_Short 5 7B id = 331
TAG_Byte 5 9B Count = 30
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 16
TAG_Short 5 7B id = 65
TAG_Byte 5 9B Count = 59
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 17
TAG_Short 5 7B id = 4
TAG_Byte 5 9B Count = 64
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 18
TAG_Short 5 7B id = 262
TAG_Byte 5 9B Count = 2
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 20
TAG_Short 5 7B id = 13
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 21
TAG_Short 5 7B id = 58
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 22
TAG_Short 5 7B id = 76
TAG_Byte 5 9B Count = 22
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 23
TAG_Short 5 7B id = 50
TAG_Byte 5 9B Count = 23
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 24
TAG_Short 5 7B id = 4
TAG_Byte 5 9B Count = 64
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 25
TAG_Short 5 7B id = 326
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 26
TAG_Short 5 7B id = 4
TAG_Byte 5 9B Count = 40
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 27
TAG_Short 5 7B id = 288
TAG_Byte 5 9B Count = 57
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 28
TAG_Short 5 7B id = 4
TAG_Byte 5 9B Count = 63
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 29
TAG_Short 5 7B id = 325
TAG_Byte 5 9B Count = 1
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 30
TAG_Short 5 7B id = 85
TAG_Byte 5 9B Count = 37
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 31
TAG_Short 5 7B id = 296
TAG_Byte 5 9B Count = 2
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 32
TAG_Short 5 7B id = 103
TAG_Byte 5 9B Count = 10
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 33
TAG_Short 5 7B id = 263
TAG_Byte 5 9B Count = 11
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 34
TAG_Short 5 7B id = 3
TAG_Byte 5 9B Count = 45
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Compound 4 36B = 5 children
TAG_Byte 5 8B Slot = 35
TAG_Short 5 7B id = 69
TAG_Byte 5 9B Count = 25
TAG_Short 5 11B Damage = 0
TAG_End 5 1B =
TAG_Int 3 20B foodTickTimer = 0
TAG_End 3 1B =
TAG_Int 2 13B SpawnY = 64
TAG_Int 2 15B rainTime = 22432
TAG_Int 2 18B thunderTime = 149982
TAG_Int 2 13B SpawnZ = 252
TAG_Byte 2 12B hardcore = 0
TAG_Int 2 13B SpawnX = 12
TAG_Byte 2 11B raining = 0
TAG_Long 2 15B Time = -7724932775668099000
TAG_Byte 2 14B thundering = 0
TAG_Int 2 15B GameType = 0
TAG_Byte 2 15B MapFeatures = 1
TAG_Int 2 14B version = 19132
TAG_Long 2 21B LastPlayed = 1574921277333
TAG_String 2 22B LevelName = valhalla
TAG_Long 2 21B SizeOnDisk = 251522884
TAG_End 2 1B =
TAG_End 1 1B =
