Mark Dickinson <dicki...@gmail.com> added the comment:
I'm half-convinced that struct.pack *should* ideally add trailing padding
in the same situation that C does, for consistency with C. Then calcsize
would match C's sizeof. If you're writing or reading a struct from C,
it's probably easiest/most natural to write or read sizeof(my_struct)
bytes, rather than worrying about stripping trailing padding for
efficiency.
I don't see a sensible way to make this change without breaking backwards
compatibility, though.
(Note: this still wouldn't mean that the calcsize result would be
independent of order: calcsize('cci') and calcsize('cic') would still be
different, for example, on a typical platform.)
Eric's solution of adding '0i' should be included in the documentation
update.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue7355>
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