Python: Strange output when calculate md5

Question

When i calculate MD5 for a file in Python i get a strange output. My function :

def md5_for_file(self, fname, block_size=2**20):
    f = open(fname)
    data = f.read()
    m = md5.new()
    if len(data)>0:
        m.update(data)
        f.close()
        return m.digest()

Output :

output http://img51.imageshack.us/img51/6615/20j7.png

I need to convert that to utf8 or what?!

md5 is deprecated. You should use hashlib instead. docs.python.org/2/library/hashlib.html#module-hashlib — Cfreak
– Cfreak, Commented Sep 14, 2013 at 18:07

Community · Accepted Answer · 2017-05-23 12:09:05Z

1

digest is returning the digest as a binary string representing the array of bytes. If you want your digest in hex, e.g. to display it to the user, use the hexdigest method instead.

Also, as pointed out by Cfreak, md5 is deprecated, you should use hashlib instead. Finally, your function is not using the block_size parameter - it will always read the whole file into memory in order to calculate the digest.

edited May 23, 2017 at 12:09

CommunityBot

11 silver badge

answered Sep 14, 2013 at 18:05

user4815162342

159k22 gold badges350 silver badges418 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Shockwave Over a year ago

Thank you! hexdigest works! Yeah...i forgot about the block_size and i'm forced to use python 2.2 so i can't use hashlib and also i couldn't find hashlib for windows and so on... Thank you again! :D

Shockwave Over a year ago

Hmm... Why python MD5 is different than php/visual basic MD5 of the same file?

user4815162342 Over a year ago

@Cataclismo Maybe you forgot to open the file in binary mode? Either way, this seems like material for a new question - with more information and reproducible examples, of course...

Collectives™ on Stack Overflow

Python: Strange output when calculate md5

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related