python暴力破解MD5

from hashlib import md5
from string import ascii_letters,digits
from itertools import permutations
from time import time
all_letters=ascii_letters+digits+'.,;'
def decrypt_md5(md5_value):
if len(md5_value)!=32:
print('error')
return
md5_value=md5_value.lower()
for k in range(5,10):
for item in permutations(all_letters,k):
item=''.join(item)
print('.',end='')
if md5(item.encode()).hexdigest()==md5_value:
return item
md5_value  ='e7d057704ea5206d8cb61280741238f5'
start=time()
result=decrypt_md5(md5_value)
if result:
print('\n Success: '+md5_value+'==>'+result)
print('Time used:',time()-start)