Script to calculate expected number of items bartered from a stack of gold blocks in Minecraft 1.17

barter.py

#!/usr/bin/python

items=[
    {"name": "soul speed book",           "num":1,              "chance":5/459,  "stacksize":1},
    {"name": "soul speed boots",          "num":1,              "chance":8/459,  "stacksize":1},
    {"name": "splash fire resist potion", "num":1,              "chance":8/459,  "stacksize":1},
    {"name": "fire resist potion",        "num":1,              "chance":8/459,  "stacksize":1},
    {"name": "water bottle",              "num":1,              "chance":10/459, "stacksize":1},
    {"name": "iron nugget",               "num":sum([10,36])/2, "chance":10/459, "stacksize":64},
    {"name": "ender pearl",               "num":sum([2,4])/2,   "chance":10/459, "stacksize":16},
    {"name": "string",                    "num":sum([3,9])/2,   "chance":20/459, "stacksize":64},
    {"name": "quartz",                    "num":sum([5,12])/2,  "chance":20/459, "stacksize":64},
    {"name": "obsidian",                  "num":1,              "chance":40/459, "stacksize":64},
    {"name": "crying obsidian",           "num":sum([1,3])/2,   "chance":40/459, "stacksize":64},
    {"name": "fire charge",               "num":1,              "chance":40/459, "stacksize":64},
    {"name": "leather",                   "num":sum([2,4])/2,   "chance":40/459, "stacksize":64},
    {"name": "soul sand",                 "num":sum([2,8])/2,   "chance":40/459, "stacksize":64},
    {"name": "nether brick",              "num":sum([2,8])/2,   "chance":40/459, "stacksize":64},
    {"name": "spectral arrow",            "num":sum([6,12])/2,  "chance":40/459, "stacksize":64},
    {"name": "gravel",                    "num":sum([8,16])/2,  "chance":40/459, "stacksize":64},
    {"name": "blackstone",                "num":sum([8,16])/2,  "chance":40/459, "stacksize":64},
]

gold = 64 * 9
print("    STACKS |  ITEMS | NAME")
for item in items:
    print("    {:-6.2f} | {:-6.2f} | {}".format(
        gold * item['chance'] * item['num'] / item['stacksize'],
        gold * item['chance'] * item['num'],
        item['name']
    ))

barter.py | sort -n

    STACKS |  ITEMS | NAME
      0.78 |  50.20 | fire charge
      0.78 |  50.20 | obsidian
      1.57 | 100.39 | crying obsidian
      2.35 | 150.59 | leather
      2.35 | 150.59 | string
      2.35 |  37.65 | ender pearl
      3.33 | 213.33 | quartz
      3.92 | 250.98 | nether brick
      3.92 | 250.98 | soul sand
      4.51 | 288.63 | iron nugget
      6.27 |   6.27 | soul speed book
      7.06 | 451.76 | spectral arrow
      9.41 | 602.35 | blackstone
      9.41 | 602.35 | gravel
     10.04 |  10.04 | fire resist potion
     10.04 |  10.04 | soul speed boots
     10.04 |  10.04 | splash fire resist potion
     12.55 |  12.55 | water bottle