On 08.06.16 11:04, Victor Stinner wrote:
Currently, the ``bytes`` and ``bytearray`` constructors accept an integer
argument and interpret it as meaning to create a zero-initialised sequence
of the given size::
(...)
This PEP proposes to deprecate that behaviour in Python 3.6, and remove it
entirely in Python 3.7.
I'm opposed to this change (presented like that). Please stop breaking
the backward compatibility in minor versions.
The argument for deprecating bytes(n) is that this has different meaning
in Python 2, and when backport a code to Python 2 or write 2+3
compatible code there is a risk to make a mistake. This argument is not
applicable to bytearray(n).
*If* you still want to deprecate bytes(n), you must introduce an
helper working on *all* Python versions. Obviously, the helper must be
avaialble and work for Python 2.7. Maybe it can be the six module.
Maybe something else.
The obvious way to create the bytes object of length n is b'\0' * n. It
works in all Python versions starting from 2.6. I don't see the need in
bytes(n) and bytes.zeros(n). There are no special methods for creating a
list or a string of size n.
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