Max Leason wrote:
> Hi,
>
> I'm attempting to read the first MB of a binary file and then do a
> md5 hash on it so that i can find the file later despite it being
> moved or any file name changes that may have been made to it. These
> files are large (350-1400MB) video files and i often located on a
> different computer and I figure that there is a low risk for
> generating the same hash between two files. The problem occurs in the
> read command which returns all \x00s. Any ideas why this is
> happening?
>
> Code:
>>>>> open("Chuck.S01E01.HDTV.XViD-YesTV.avi", "rb").read(1024)
> b'\x00\x00\x00\x00\x00\x00....\x00'
>
You're reading the first 1024 bytes. Perhaps the first 1024 bytes of the
file _are_ all zero!
Try reading more and checking those, eg:
SIZE = 1024 ** 2
>>> open("Chuck.S01E01.HDTV.XViD-YesTV.avi", "rb").read(SIZE) ==
b'\x00' * SIZE
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