[Python-Dev] Adding bytes.frombuffer() constructor to PEP 467 (was: [Python-ideas] Adding bytes.frombuffer() constructor (original) (raw)

INADA Naoki songofacandy at gmail.com
Wed Oct 12 22:59:00 EDT 2016

Also, why do the conversion from bytearray to bytes? It is definitely not always needed.

ba = bytearray(b'abc') b = b'def' ba + b bytearray(b'abcdef') b'%s %s' % (ba, b) b'abc def' b + ba b'defabc' ba.extend(b) ba bytearray(b'abcdef') Even if it is sometimes needed, why do it always? The essence of readline is to slice out a line, delete it from the buffer, and return the line. Let the caller explicitly convert when needed. -- Terry Jan Reedy

Because it's public module API.

While bytearray is mostly API compatible (passes duck typing), isinstance(b, bytes) is False when b is bytearray.

So, I feel changing return type from bytes to bytearray is last option. I want to return bytes if possible.

-- INADA Naoki <songofacandy at gmail.com>

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