python分别生成字符串、文件、目录的MD5编码，pythonmd5,from hashlib

python分别生成字符串、文件、目录的MD5编码，pythonmd5,from hashlib

from hashlib import md5def calMD5(str):  m = md5()  m.update(str)  return m.hexdigest() def calMD5ForFile(file):  m = md5()  a_file = open(file, 'rb')  m.update(a_file.read())  a_file.close()  return m.hexdigest()def calMD5ForFolder(dir,MD5File):  import os  outfile = open(MD5File,'w')  for root, subdirs, files in os.walk(dir):    for file in files:      filefullpath = os.path.join(root,file)      print filefullpath      filerelpath = os.path.relpath(filefullpath,dir)      md5 = calMD5ForFile(filefullpath)      outfile.write(filerelpath + ' ' + md5 + '\n')  outfile.close()print calMD5('This is one test string')print calMD5ForFile('c:\\test\\mytest.txt')calMD5ForFolder('c:\\test','c:\\mdfile.md5')