asyncfile.py 文件源码

def seek(self, offset, whence=os.SEEK_SET):
            """Similar to 'seek' of file descriptor; works only for
            regular files.
            """
            if whence == os.SEEK_SET:
                self._overlap.Offset = offset
            elif whence == os.SEEK_CUR:
                self._overlap.Offset += offset
            else:
                assert whence == os.SEEK_END
                if isinstance(self._path, str):
                    sb = os.stat(self._path)
                    self._overlap.Offset = sb.st_size + offset
                else:
                    self._overlap.Offset = offset