Hum, it seems like this is a confusion between converting a whole
bytes *string* to/from an integer, and converting a single *character*
to/from an integer.
I propose to rename PEP 467 method bytes.fromint(n) to =>
bytes.fromchar(n) <= to convert an integer to a single *character*: it
fails if n is not in the [0; 255] range. "char" comes from
"character", as "bchr()" means "bytes character".
For C programmers, the usage of the "char" type is common for a single
*character*. The char type is not treated as an integer, but part of a
character string. All string functions take "char*" type (strcpy,
printf, etc.). Converting an integer to a "char" in C: "int x = 1;
char ch = (char)x;".
I suggest to *not* add a builtin function bchr(), it's not common
enough to justify to add it: it's trivial to create you own bchr()
function:
bchr = bytes.fromchar
By the way, it's a little unfortunate that int methods have an
underscore in their name (int.to_bytes, int.bit_length,
int.as_integer_ratio), whereas bytes methods have no undersore in
their name (bytes.removeprefix, bytes.islower). I guess that we should
follow the trend of existing methods: so no underscore for
bytes/bytearray methods.
Victor
On Wed, Sep 8, 2021 at 7:06 PM Brandt Bucher <brandtbuc...@gmail.com> wrote:
>
> Steven D'Aprano wrote:
> > To me, it sounds like should be the opposite of int.from_bytes.
> > >>> int.from_bytes(b'Hello world', 'little')
> > 121404708502361365413651784
> > >>> bytes.from_int(121404708502361365413651784, 'little')
> > # should return b'Hello world'
> > If that's not the API being suggested, that's going to be confusing.
>
> I'm a bit lost here... why are we convinced at all that we need a new way to
> do this? Hasn't this functionality already existed for years?
>
> >>> x = int.from_bytes(b"*", "little")
> >>> x
> 42
> >>> x.to_bytes(1, "little")
> b'*'
>
> Brandt
> _______________________________________________
> Python-Dev mailing list -- python-dev@python.org
> To unsubscribe send an email to python-dev-le...@python.org
> https://mail.python.org/mailman3/lists/python-dev.python.org/
> Message archived at
> https://mail.python.org/archives/list/python-dev@python.org/message/FMG5K4BOX5GSUR2KU3G5ZLBBUIC3EQKD/
> Code of Conduct: http://python.org/psf/codeofconduct/
--
Night gathers, and now my watch begins. It shall not end until my death.
_______________________________________________
Python-Dev mailing list -- python-dev@python.org
To unsubscribe send an email to python-dev-le...@python.org
https://mail.python.org/mailman3/lists/python-dev.python.org/
Message archived at
https://mail.python.org/archives/list/python-dev@python.org/message/TGUWZ7FV7CA5LOCPIFOP3WUP6Z5NQDTD/
Code of Conduct: http://python.org/psf/codeofconduct/
