python read binary from specific position

I have a huge binary file from which I want to read some byt开发者_运维百科es from exact positions in the file. How can I access specific bytes from binary file not having to loop through all bytes from the beginning of the file? Thanx,

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Make sure you open the file with the "b" attribute (for example: file("myfile.bin", "rb")). Then use the seek() method of the file object.

Look here: http://docs.python.org/release/2.4.4/lib/bltin-file-objects.html