On Tue, Mar 2, 2021 at 5:03 AM <mmax42...@gmail.com> wrote: > > Currently, the only way to concatenate an integer to a bytes object is by > converting the integer to bytes with a function call before concatenating. > And there is no way to make a mutable bytes object without a function call. > > I propose an array-type string like the, or for the bytearray. It would work > as a mutable b-string, as > > foo = a"\x00\x01\x02abcÿ" # a-string, a mutable bytes object. > foo[0] = 123 # Item assignment > foo+= 255 # Works the same as > bytesvariable+=b"123" > foo+= a"\x255\x00" # Concatenation with itself > foo+= b"\x255\x00" # Cross compatibility with bytes objects. > > This would be processed the same as, or would be the bytearray, > >>> type(a"\x00\x01\x02abcÿ") > <class 'bytearray'>
A bytearray already has an append method that does what you want. >>> foo = bytearray(b"\x00\x01\x02abc") >>> foo.append(255) >>> foo bytearray(b'\x00\x01\x02abc\xff') Adding a string and a number is, in most languages where it's legal, interpreted as "represent this number in digits, then append those digits to the string". Having it mean the opposite here would be very confusing. So, you're asking for a couple of things here. One, an easier way to append one byte to a bytearray. Two, a literal syntax for bytearrays. I'd recommend splitting this into those two, or focusing on the one that's more important to you; at the moment, you haven't really made much of a case for either. (Note that your a-string, if it is indeed simply a bytearray, is already able to have other bytearrays and bytes strings concatenated onto it.) So go for it: convince us! :) Tell us why a literal syntax (or technically, a "display" syntax) for bytearrays is important; and/or tell us why it's important to have an operator for adding an integer onto a bytearray. ChrisA _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/JDMVY2QNGMYXG56576TGZYNIMQ4LAMIG/ Code of Conduct: http://python.org/psf/codeofconduct/
