Method unregister

Lib/selectors.py:251–256

(self, fileobj)

        return key

    def unregister(self, fileobj):
        try:
            key = self._fd_to_key.pop(self._fileobj_lookup(fileobj))
        except KeyError:
            raise KeyError("{!r} is not registered".format(fileobj)) from None
        return key

    def modify(self, fileobj, events, data=None):
        try: