代码：

#加载飞桨、Numpy和相关类库
import paddle
from paddle.nn import Linear
import paddle.nn.functional as F
import numpy as np
import os
import random

报错信息：

aistudio@jupyter-311311-2610703:~$ python t.py
/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/setuptools/depends.py:2: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
import imp
Traceback (most recent call last):
File "t.py", line 2, in
import paddle
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/__init__.py", line 29, in
from .fluid import monkey_patch_variable
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/__init__.py", line 51, in
from . import io
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/io.py", line 30, in
from paddle.fluid import layers
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/layers/__init__.py", line 37, in
from .learning_rate_scheduler import *
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/layers/learning_rate_scheduler.py", line 35, in
from ..dygraph import learning_rate_scheduler as imperate_lr
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/dygraph/__init__.py", line 35, in
from . import checkpoint
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/dygraph/checkpoint.py", line 27, in
from paddle.fluid.dygraph.jit import _SaveLoadConfig
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/dygraph/jit.py", line 30, in
from paddle.fluid.dygraph.dygraph_to_static import logging_utils
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/dygraph/dygraph_to_static/__init__.py", line 32, in
from . import convert_call_func
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/dygraph/dygraph_to_static/convert_call_func.py", line 22, in
import pdb
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/pdb.py", line 76, in
import code
File "/home/aistudio/code.py", line 4, in
from paddle.nn import Linear
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/nn/__init__.py", line 18, in
from .layer import norm
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/nn/layer/__init__.py", line 17, in
from . import activation
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/nn/layer/activation.py", line 48, in
from paddle.framework import get_default_dtype
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/framework/__init__.py", line 39, in
from .io import save
File "/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/framework/io.py", line 30, in
from paddle.fluid.io import _unpack_saved_dict, _pack_loaded_dict
ImportError: cannot import name '_unpack_saved_dict' from 'paddle.fluid.io' (/opt/conda/envs/python35-paddle120-env/lib/python3.7/site-packages/paddle/fluid/io.py)