Patrick Haller added the comment: You will see this on every bytes and bytearray type as the behaviour described is the same for both. ---------- nosy: +HallerPatrick _______________________________________ Python tracker https://bugs.python.org/issue42948 _______________________________________

Terry J. Reedy added the comment: Patrick, I am not sure what you are saying. All the methods listed is this section are for both, as with bytes.count(sub[, start[, end]]) bytearray.count(sub[, start[, end]])¶ but only bytearray has .copy (since there is never a need to copy an immutable). This appears to be only methods like this. PR created. ---------- stage: patch review -> type: enhancement -> behavior versions: -Python 3.6, Python 3.7 _______________________________________ Python tracker https://bugs.python.org/issue42948 _______________________________________

Josh Rosenberg added the comment: Does this need specific documentation? bytearray itself is documented with:

As bytearray objects are mutable, they support the mutable sequence operations in addition to the common bytes and bytearray operations described in Bytes and Bytearray Operations.

where "mutable" is a link to all the mutable sequence operations ( https://docs.python.org/3/library/stdtypes.html#typesseq-mutable ), including copy. Specifically documenting copy for bytearray is pointless; are we going to add specific documentation for append and remove and all the other mutable sequence operations as well? ---------- nosy: +josh.r _______________________________________ Python tracker https://bugs.python.org/issue42948 _______________________________________

wim glenn added the comment: Oh, I've missed that part. Although the note (5) seems to indicate that the copy method refers to sequence types which don't support slicing, it still seems adequately documented under the mutable sequence operations. I'll close this. ---------- stage: -> resolved status: open -> closed _______________________________________ Python tracker https://bugs.python.org/issue42948 _______________________________________