import hashlib

prev = f'000000: origin'
prev_hash = hashlib.sha256(bytes(prev,'utf-8')).hexdigest()
print('origin: '+ prev)
prefix = prev_hash[:6]

n = 0;
while n < 5:
    nonce = 0;
    while True:
        cur = f'{prefix}: data:"new transaction" no: "{n}" nonce:"{nonce}"'
        cur_hash = hashlib.sha256(bytes(cur,'utf-8')).hexdigest()
        if prev_hash > cur_hash: # if this is smaller
            prev = cur
            prev_hash = cur_hash
            prefix = prev_hash[:6]
            print(f'next block: {prefix} nonce: {nonce}')
            print(f'  hash: {cur_hash}')
            print(f'  data: {cur}')
            n += 1
            break
        else:
            nonce += 1 # the nonce can be anything to solve the sha puzzle

origin: 000000: origin
next block: 46f7d8 nonce: 4
  46f7d85d73104873bfb44c3bcad288c690e7aa9fbaea6409360202773fc1eb98
  79a198: data:"new transaction" no: "0" nonce:"4"
next block: 058b27 nonce: 6
  058b2702c1d37b83b2071702894bb712b0daf853e2d85b22a8fc040926b2f0ab
  46f7d8: data:"new transaction" no: "1" nonce:"6"
.
.
.
  0165517dbccd44850442e8b2d3998fb4e24b735a7c77ac64c449fe15b87d5038
  032ce1: data:"new transaction" no: "3" nonce:"29"
next block: 003a8c nonce: 254
  003a8c9d01188d9e2cef6039140e81b0891b9e94cd53450f0899559da6d6c654
  016551: data:"new transaction" no: "4" nonce:"254"

import random
import numpy as np

alice = 'alice'
bob = 'bob'
charlie = 'charlie'

# alice holds three stakes
a = [alice, alice, alice]

# bob holds two stakes
b = [bob, bob]

# charlie holds one stake
c = [charlie]

bag = a + b + c

winners = ''

prev_win = random.choice(a+b+c)
winners += prev_win

for i in range(5):
    cur_win = random.choice(bag)

    if cur_win == prev_win: # prevents too much consecutive wins
        cur_win = random.choice(bag)

    winners += f', {cur_win}'
    bag.append(cur_win)
    prev_win = cur_win

print(winners)

a = np.array(bag)
unique, counts = np.unique(a, return_counts=True)
print(dict(zip(unique, counts)))

alice, alice, charlie, alice, bob, charlie
{'alice': 5, 'bob': 3, 'charlie': 3}