AttributeError: module 'tensorflow._api.v2.train' has no attribute 'Optimizer'

[SuGoe-Young]

Hi! I got this error while running eval code after done your step.
can you help me sovle this problem?

(```
crfnet_2) young@young-hislab:~/disk/code/study_master/crfnet$ python evaluate_crfnet.py --config configs/default.cfg --model saved_models/crf_net.h5 --st 0.5
Using TensorFlow backend.
2023-04-22 17:10:23.334967: I tensorflow/stream_executor/platform/default/dso_loader.cc:49] Successfully opened dynamic library libcudart.so.11.0
WARNING:tensorflow:From /home/young/anaconda3/envs/crfnet_2/lib/python3.6/site-packages/tensorflow/python/compat/v2_compat.py:96: disable_resource_variables (from tensorflow.python.ops.variable_scope) is deprecated and will be removed in a future version.
Instructions for updating:
non-resource variables are not supported in the long term

Loading NuScenes tables for version v1.0-mini...
23 category,
8 attribute,
4 visibility,
911 instance,
12 sensor,
120 calibrated_sensor,
31206 ego_pose,
8 log,
10 scene,
404 sample,
31206 sample_data,
18538 sample_annotation,
4 map,
Done loading in 0.3 seconds.

Reverse indexing ...
Done reverse indexing in 0.0 seconds.

Initializing data generator: / |# | 0 Elapsed Time: 0:00:00XXX lineno: 75, opcode: 0
An error occurred: unknown opcode

[foundnom]

I ran into a similar problem
i fixed it by changing 'tf.train.Optimizer' to 'tf.keras.optimizers.Optimizer'