Christian Heimes added the comment:
Hardware restrictions, some CPUs require types to be aligned in certain ways.
Doubles must be aligned by multiple of 8 bytes.
Please read https://en.wikipedia.org/wiki/Data_structure_alignment and use the
Python users mailing list for further questions.
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Róbert Lexmann added the comment:
Thanks for a fast response. If I may ask, what is it good for to encode
'id' in 16 bytes and 'di' in 12?
Rob
On 01/24/2018 12:00 PM, Christian Heimes wrote:
> Christian Heimes added the comment:
>
> It's not a bug. Please read the section about padding.
>
>>
Christian Heimes added the comment:
It's not a bug. Please read the section about padding.
>>> struct.calcsize('id')
16
>>> struct.calcsize('>id')
12
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nosy: +christian.heimes
resolution: -> not a bug
stage: -> resolved
status: open -> closed
___
New submission from Róbert Lexmann :
struct.pack('id',a,b) returns 16 bytes, should return 4+8=12 bytes.
struct.calcsize('id') also returns 16.
--
messages: 310584
nosy: Róbert Lexmann
priority: normal
severity: normal
status: open
title: Wrong byte count with struct
type: behavior
vers
