scandir.py 文件源码

def is_dir(self, follow_symlinks=True):
                if (self._d_type == DT_UNKNOWN or
                        (follow_symlinks and self.is_symlink())):
                    try:
                        st = self.stat(follow_symlinks=follow_symlinks)
                    except OSError as e:
                        if e.errno != ENOENT:
                            raise
                        return False
                    return st.st_mode & 0o170000 == S_IFDIR
                else:
                    return self._d_type == DT_DIR