On 02:38 am, ba...@python.org wrote:
So, what I'm really asking is this. Let's say you agree that there
are use cases for accessing a header value as either the raw encoded
bytes or the decoded unicode. What should this return:
>>> message['Subject']
The raw bytes or the decoded unicode?
My personal preference would be to just get deprecate this API, and get
rid of it, replacing it with a slightly more explicit one.
message.headers['Subject']
message.bytes_headers['Subject']
Now, setting headers. Sometimes you have some unicode thing and
sometimes you have some bytes. You need to end up with bytes in the
ASCII range and you'd like to leave the header value unencoded if so.
But in both cases, you might have bytes or characters outside that
range, so you need an explicit encoding, defaulting to utf-8 probably.
message.headers['Subject'] = 'Some text'
should be equivalent to
message.headers['Subject'] = Header('Some text')
My preference would be that
message.headers['Subject'] = b'Some Bytes'
would simply raise an exception. If you've got some bytes, you should
instead do
message.bytes_headers['Subject'] = b'Some Bytes'
or
message.headers['Subject'] = Header(bytes=b'Some Bytes',
encoding='utf-8')
Explicit is better than implicit, right?
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