Md5 is different in Windows and Linux

[Sarvagya Pant]

Hello, I am amazed that the  md5 of a file given by python in windows is
different than that of linux. Consider the following code:

import hashlib
def md5_for_file(f, block_size=2**20):
    md5 = hashlib.md5()
    while True:
        data = f.read(block_size)
        if not data:
            break
        md5.update(data)
    return md5.hexdigest()

f = open("somefile.txt")
print md5_for_file(f)

When I run the program I get the checksum value:
2f9cc8da53ee89762a34702f745d2956

But on this site http://onlinemd5.com/ and on linux it has value
E10D4E3847713472F51BC606852712F1.

Why is there difference in value of Checksum computed by python in windows
and other system.?

-- 
*sarvagya*
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Hello
Check the MD5
of this file