Antoine Pitrou wrote: > > Antoine Pitrou <pitrou@free.fr> added the comment: > > Or perhaps the bytearray can be converted to a bytes object. This is not optimal performance-wise but is unlikely to make a difference in real-world code (if you are passing a filename to an external API, chances are some IO will occur which will dwarf the cost of creating a separate bytes object). > > But I agree that supporting bytearrays in filename-taking functions, while "nice" from a consistency point of view, isn't really useful in practice. So I would be ok to remove that support if it simplifies (or avoids complexifying) the logic for those functions. +1 bytearrays are basically the remains of the attempt to use mutable byte string objects in Python 3.x. They may gain some usefulness in the future, but I doubt that this will be in the area of filenames.