Python hashlib模块与subprocess模块使用详细介绍

import hashlib
m=hashlib.md5()
m.update('hello'.encode('utf-8'))
m.update('world'.encode('utf-8'))
res=m.hexdigest() # 'helloworld'
print(res)
m1=hashlib.md5('he'.encode('utf-8'))
m1.update('llo'.encode('utf-8'))
m1.update('w'.encode('utf-8'))
m1.update('orld'.encode('utf-8'))
res=m1.hexdigest()# 'helloworld'
print(res)

cryptograph='aee949757a2e698417463d47acac93df'
import hashlib
# 制作密码字段
passwds=[
    'alex3714',
    'alex1313',
    'alex94139413',
    'alex123456',
    '123456alex',
    'a123lex',
]
dic={}
for p in passwds:
    res=hashlib.md5(p.encode('utf-8'))
    dic[p]=res.hexdigest()
# 模拟撞库得到密码
for k,v in dic.items():
    if v == cryptograph:
        print('撞库成功，明文密码是：%s' %k)
        break

import hashlib
m=hashlib.md5()
m.update('天王'.encode('utf-8'))
m.update('alex3714'.encode('utf-8'))
m.update('盖地虎'.encode('utf-8'))
print(m.hexdigest())

import subprocess
obj=subprocess.Popen('echo 123 ; ls / ; ls /root',shell=True,
                 stdout=subprocess.PIPE,  #正确的管道
                 stderr=subprocess.PIPE,　#错误的管道
                 )
# print(obj)
# res=obj.stdout.read()
# print(res.decode('utf-8'))
err_res=obj.stderr.read()
print(err_res.decode('gbk')) #  windows下需要用gbk解码mac、linux用utf-8解码