_fileobjectposix.py 文件源码

def write(self, b):
        if not self._writable:
            raise UnsupportedOperation('write')
        while True:
            try:
                return _write(self._fileno, b)
            except (IOError, OSError) as ex:
                if ex.args[0] not in ignored_errors:
                    raise
            self.hub.wait(self._write_event)