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[Python-Dev] TextIO seek and tell cookies

Greg Ewing greg.ewing at canterbury.ac.nz
Mon Sep 26 18:43:38 EDT 2016 
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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