Does hashlib support a file mode?

[Phlip]

Tx, all!. But...

> For example I use this function to copy a stream and return a SHA512 and
> the output streams size:
>
>     def write(self, in_handle, out_handle):
>         m = hashlib.sha512()
>         data = in_handle.read(4096)
>         while True:
>             if not data:
>                 break
>             m.update(data)
>             out_handle.write(data)
>             data = in_handle.read(4096)
>         out_handle.flush()
>         return (m.hexdigest(), in_handle.tell())

The operation was a success but the patient died.

My version of that did not return the same hex digest as the md5sum
version:


def file_to_hash(path, m = hashlib.md5()):

    with open(path, 'r') as f:

        s = f.read(8192)

        while s:
            m.update(s)
            s = f.read(8192)

    return m.hexdigest()

You'll notice it has the same control flow as yours.

That number must eventually match an iPad's internal MD5 opinion of
that file, after it copies up, so I naturally cannot continue working
this problem until we see which of the two numbers the iPad likes!