STINNER Victor added the comment: > To be able to use GPIO Sysfs Interface on our embedded platforms we require > exceptional event support.
Antoine Pitrou noticed that "exception" term can be confusion in Python, since exceptions are like "raise ValueError(...)". The manual page mentions "out-of-band (OOB) data". http://man7.org/linux/man-pages/man2/select_tut.2.html exceptfds This set is watched for "exceptional conditions". In practice, only one such exceptional condition is common: the availability of out-of-band (OOB) data for reading from a TCP socket. See recv(2), send(2), and tcp(7) for more details about OOB data. (One other less common case where select(2) indicates an exceptional condition occurs with pseudoterminals in packet mode; see ioctl_tty(2).) After select() has returned, exceptfds will be cleared of all file descriptors except for those for which an exceptional condition has occurred. Is it what you need for a GPIO? GPIO is unrelated to TCP, right? ---------- nosy: +haypo _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30844> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
