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From: Tim Chase <python.list@tim.thechases.com>
Newsgroups: comp.lang.python
Subject: Re: new to python, help please !!
Date: Thu, 12 Nov 2015 05:48:12 -0600
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On 2015-11-12 08:21, Marko Rauhamaa wrote:
> And if you really wanted to compare two files that are known to
> contain MD5 checksums, the simplest way is:
> 
>    with open('f1.md5') as f1, open('f2.md5') as f2:
>        if f1.read() == f2.read():
>            ...
>        else:
>            ...

Though that suffers if the files are large.  Might try

  CHUNK_SIZE = 4 * 1024 # read 4k chunks
  # chunk_offset = 0
  with open('f1.md5') as f1, open('f2.md5') as f2:
    while True:
      c1 = f1.read(CHUNK_SIZE)
      c2 = f2.read(CHUNK_SIZE)
      if c1 or c2:
        # chunk_offset += 1
        if c1 != c2:
          not_the_same(c1, c2)
          # not_the_same(chunk_offset * CHUNK_SIZE, c1, c2)
          break
      else: # EOF
        the_same()
        break

which should perform better if the files are huge

-tkc