chg python-doc

http.py 不对外
这块不要讲代码
直接 讲 import 哪部分内容
from .auth import Auth

from .config import set_default

from .services.storage.bucket import BucketManager, build_batch_copy, build_batch_rename, build_batch_move, build_batch_stat, build_batch_delete
from .services.storage.uploader import put_data, put_file, put_stream
from .services.processing.pfop import PersistentFop
from .services.processing.cmd import build_op, pipe_cmd, op_save

from .utils import urlsafe_base64_encode, urlsafe_base64_decode, etag, entry