python检测文件的MD值

#python 检测文件MD5值
#python version 2.6import hashlib
import os,sys#简单的测试一个字符串的MD5值
def GetStrMd5(src):
m0=hashlib.md5()
m0.update(src)
print m0.hexdigest()
pass#大文件的MD5值
def GetFileMd5(filename):
if not os.path.isfile(filename):
return
myhash = hashlib.md5()
f = file(filename,'rb')
while True:
b = f.read(8096)
if not b :
break
myhash.update(b)
f.close()
return myhash.hexdigest()def CalcSha1(filepath):
with open(filepath,'rb') as f:
sha1obj = hashlib.sha1()
sha1obj.update(f.read())
hash = sha1obj.hexdigest()
print(hash)
return hashdef CalcMD5(filepath):
with open(filepath,'rb') as f:
md5obj = hashlib.md5()
md5obj.update(f.read())
hash = md5obj.hexdigest()
print(hash)
return hash if __name__ == "__main__":
if len(sys.argv)==2 :
hashfile = sys.argv[1]
if not os.path.exists(hashfile):
hashfile = os.path.join(os.path.dirname(__file__),hashfile)
if not os.path.exists(hashfile):
print("cannot found file")
else
CalcMD5(hashfile)
else:
CalcMD5(hashfile)
#raw_input("pause")
else:
print("no filename")