Mock Transaction: N people have `DEFALUT_WALLET` CNY at the beginning, and will transfer 1 CNY to another person in each round. After R rounds, this program will print how much money each person has.

main.py

#!/usr/bin/env python3

import random

DEFAULT_WALLET = 100
N = 100
R = 100

def do_transaction(storage, id_from, id_to):
    storage[id_from] -= 1
    storage[id_to] += 1

def check_transaction(storage, id_from):
    return storage[id_from] > 0

def choose_target(id_from):
    while True:
        __target = random.randint(0, N - 1)
        if __target != id_from:
            return __target

def setup():
    return [DEFAULT_WALLET] * N

def process(storage):
    for __T in range(R):
        for current in range(N):
            if check_transaction(storage, current):
                do_transaction(storage, current, choose_target(current))

def main():
    for _ in range(100):
        storage = setup()
        process(storage)
        print("Round %d" % (_ + 1), sorted(storage)[:15], sorted(storage)[-15:])

main()

vector.py

#!/usr/bin/env python3

import numpy as np

N = 100
R = 1000
DEFAULT_WALLET = 100
__line = np.linspace(0, N - 2, N)

def process():

  wealth = np.ones(N) * DEFAULT_WALLET
  
  for _ in range(R):
      seed = np.random.randint(0, N - 1, N)
      seed += (seed >= __line)
      seed[wealth <= _] = N
      wealth += np.bincount(seed, minlength = N + 1)[:-1]
      
  wealth -= np.ones(N) * R

  return wealth

def main():
  for _ in range(1000):
    _result = sorted(process().tolist())
    print("Round %d" % _, _result[:15], _result[-15:])

main()