How do I compare files?

Larry Bates larry.bates at`
Wed Jul 23 03:47:05 CEST 2008

Clay Hobbs wrote:
> I am making a program that (with urllib) that downloads two jpeg files
> and, if they are different, displays the new one.  I need to find a way
> to compare two files in Python.  How is this done?
> -- Ratfink

Use md5 to calculate checksum:

import md5

md5file1 = md5.md5(open(filename1).read()).hexdigest()
md5file2 = md5.md5(open(filename2).read()).hexdigest()

if md5file1 != mdfile2:
     # Do whatever you want


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