New submission from Serhiy Storchaka <storchaka+cpyt...@gmail.com>: Usually the read() method of a file-like object takes one optional argument which limits the amount of data (the number of bytes or characters) returned if specified.
codecs.StreamReader.read() also has such parameter. But this is the second parameter. The first parameter limits the number of bytes read for decoding. read(1) can return 70 characters, that will confuse most callers which expect either a single character or an empty string (at the end of stream). Some times ago codecs.open() was recommended as a replacement for the builtin open() in programs that should work in 2.x and 3.x (this was before adding io.open()), and it is still used in many programs. But this peculiarity makes it bad replacement of builtin open(). I wanted to fix this issue long time ago, but forgot, and the question on Stack Overflow has reminded me about this. https://stackoverflow.com/questions/46437761/codecs-openutf-8-fails-to-read-plain-ascii-file ---------- assignee: serhiy.storchaka components: IO, Library (Lib) messages: 306701 nosy: serhiy.storchaka priority: normal severity: normal status: open title: Make codecs.StreamReader.read() more compatible with read() of other files type: behavior versions: Python 2.7, Python 3.6, Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32110> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
