On 01/11/2014 10:32 AM, Antoine Pitrou wrote:
On 2014年1月11日 18:41:49 +0100
Victor Stinner <[email protected]> wrote:
b'x=%s' % 10 is well defined, it's pure bytes.
It is well-defined? Then please explain me what the general case of
b'%s' % x
is supposed to call:
This is the key question, isn't it?
- does it call x.__bytes__? int.__bytes__ doesn't exist
Perhaps that's the problem. According to the docs:
========================================================================
object.__bytes__(self)
Called by bytes() to compute a byte-string representation of an object.
This should return a bytes object.
========================================================================
Obviously, with the plethora of different binary possibilities for representing a number (how many bytes? endianness?
which complement?), we would be well within our rights to decide that the "byte-string representation" of the numeric
types is the ASCII equivalent of their __repr__ or __str__, and implement __bytes__ appropriately for them. Any other
object that wants to be represented easily in a byte stream would also have to implement __bytes__. If necessary we
could add __bytes__ to str for /strict/ ASCII conversion (even latin-1 would have to be explicitly encoded)[1].
--
~Ethan~
[1] I'm iffy on this point as I'm not at all sure it's needed.
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