New submission from Barry A. Warsaw <[EMAIL PROTECTED]>: The bytes() builtin should respect an __bytes__() converter if it exists. E.g. instead of
>>> class Foo: ... def __bytes__(self): return b'foo' ... >>> bytes(Foo()) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'Foo' object is not iterable >>> bytes(Foo()) should return b'foo' Here's one use case. email.header.Header instances represent email headers (naturally) that conceptually are bytes, but also have a string representation. Say for example, a Subject header comes across the wire in RFC 2033 encoded utf-8. The unicode representation would be the value of the header decoded according to the RFC. The bytes representation would be the raw bytes seen on the wire. The most natural way to retrieve each representation would be >>> header = msg['subject'] >>> str(header) 'some string with non-ascii' >>> bytes(header) b'the rfc 2033 encoded raw header value' ---------- components: Interpreter Core messages: 64027 nosy: barry priority: normal severity: normal status: open title: bytes() should respect __bytes__ type: feature request versions: Python 3.0 __________________________________ Tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue2415> __________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
