mining.py

import hashlib
import time

text = "Hello World!"
nonce = 0
difficulty = "0"
start = time.time()

print("Nonce".ljust(16) + "Hash".ljust(70) + "Time")
while True:
  value = str(nonce) + text
  hash = hashlib.sha256(value.encode("utf-8")).hexdigest()
  if hash[0:len(difficulty)] == difficulty:
    elapsed = time.time() - start
    print(str(nonce).ljust(16) + hash.ljust(70) + str(elapsed))
    difficulty = difficulty + "0"
  nonce = nonce + 1