python md5

md5sum

参考 http://docs.python.org/2/library/hashlib.html

from hashlib import md5def md5_str(s):    m = md5()    m.update(s)    return m.hexdigest()def md5_file(filename):    m = md5()    a_file = open(filename, 'rb')    m.update(a_file.read())    a_file.close()    return m.hexdigest()if __name__ == '__main__':    filename = 'cq.jpg'    print md5_file(filename), filename    print md5_str(filename)