11:47:01 vstinner@apu$ ./python Python 3.10.0a0 (heads/pydoc_select:486e11db95, Jun 23 2020, 11:45:39) >>> import select>>> select.epoll.register.__text_signature__'($self, /, fd,\n         eventmask=select.EPOLLIN | select.EPOLLPRI | select.EPOLLOUT)'>>> import inspect>>> inspect.signature(select.epoll.register)<Signature (self, /, fd)>

./python -m pydoc select(...)     |  register(self, /, fd)     |      Registers a new fd or raises an OSError if the fd is already registered.     |           |        fd     |          the target file descriptor of the operation     |        eventmask     |          a bit set composed of the various EPOLL constants     |           |      The epoll interface supports all file descriptors that support poll.