Ronald Oussoren added the comment: I've just tested this on OSX 10.8.2 and the problem is not present there (that is, 'python -c "import deadline" &' does not hang)
The problem is present on OSX 10.6.8, and when using ksh(1) you can see why the process is stopped: [1] + Stopped(SIGTTOU) python -c 'import readline' & That signal is generated when the program generates output to a tty and the TOSTOP option of stty is active. Whether or not that option is active is OS configuration (and can be changed using the stty command). Reading the option: import termios lflags = termios.tcgetattr(0)[3] print (lflags & termios.TOSTOP) != 0 Oddly enough the option off on both OSX 10.6 and 10.8, which point to a bug in OSX 10.6 (or to a misunderstanding of low-level tty programming details on my part which would not be unlikely) Anyway, there is an easy workaround: before importing readline add: import signal signal.signal(signal.SIGTTOU, signal.SIG_IGN) This ignores the SIGTTOU option and allows me to import readline on the background. IMHO This issue can be closed because this behavior is not a Python bug but a platform feature. ---------- resolution: -> invalid status: open -> pending _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue14892> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
