> On 2 Feb 2022, at 18:19, Jen Kris via Python-list <python-list@python.org>
> wrote:
>
> It's not clear to me from the struct module whether it can actually
> auto-detect endianness.
It is impossible to auto detect endian in the general case.
> I think it must be specified, just as I had to do with int.from_bytes(). In
> my case endianness was dictated by how the four bytes were populated,
> starting with the zero bytes on the left.
You can specify the endian explicitly in the format strings. It’s all in the
docs.
Barry
>
>
> Feb 1, 2022, 21:30 by wlfr...@ix.netcom.com:
>
>> On Wed, 2 Feb 2022 00:40:22 +0100 (CET), Jen Kris <jenk...@tutanota.com>
>> declaimed the following:
>>
>>>
>>> breakup = int.from_bytes(byte_val, "big")
>>>
>>> print("this is breakup " + str(breakup))
>>
>>>
>>>
>>> Python prints: this is breakup 32894
>>
>>>
>>>
>>> Note that I had to switch from little endian to big endian. Python is
>>> little endian by default, but in this case it's big endian.
>>
>>>
>>>
>> Look at the struct module. I'm pretty certain it has flags for big or
>> little end, or system native (that, or run your integers through the
>> various "network byte order" functions that I think C and Python both
>> support.
>>
>> https://www.gta.ufrj.br/ensino/eel878/sockets/htonsman.html
>>
>>
>>> However, if anyone on this list knows how to pass data from a non-Python
>>> language to Python in multiprocessing.shared_memory please let me (and the
>>> list) know.
>>
>> <pondering>MMU cache lines not writing through to RAM? Can't find
>> anything on Google to force a cache flush</pondering> Can you test on a
>> different OS? (Windows vs Linux)
>>
>>
>>
>> --
>> Wulfraed Dennis Lee Bieber AF6VN
>> wlfr...@ix.netcom.com http://wlfraed.microdiversity.freeddns.org/
>> --
>> https://mail.python.org/mailman/listinfo/python-list
>>
>
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