New submission from Dolda2000: It seems open() is slightly broken in Python 3, in that one cannot open non-seekable files in read-write mode. One such common use is open("/dev/tty", "r+") for interacting directly with the controlling TTY regardless of standard stream redirections. Note that this is a regression for Python 2, where this worked as expected.
What happens is the following: >>> open("/dev/tty", "r+") Traceback (most recent call last): File "<stdin>", line 1, in <module> io.UnsupportedOperation: File or stream is not seekable. Just for the record, the same thing happens with "w+" and "rb+". This also means that the getpass module is slightly broken, since it will always fail whenever stdin is redirected. ---------- components: IO messages: 206957 nosy: Dolda2000 priority: normal severity: normal status: open title: open() of read-write non-seekable streams broken type: behavior versions: Python 3.1, Python 3.3 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue20074> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com