Ben Leslie wrote:
But the idea of transmitting these offsets outside of a running
process is not something that I had anticipated. It got me thinking:
is there a guarantee that these opaque values returned from tell() is
stable across different versions of Python?

Are they even guaranteed to work on a different file
object in the same process? I.e. if you read some stuff
from a file, do tell() on it, then close it, open it
again and seek() with that token, are you guaranteed to
end up at the same place in the file?

--
Greg
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