Error in executing in Google Colabs

[dlin95123]

While in the "pip install -r requirements.txt" step, it ran into the following error code:

Collecting scikit-learn==0.20.3
Downloading scikit-learn-0.20.3.tar.gz (11.8 MB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 11.8/11.8 MB 77.7 MB/s eta 0:00:00
Preparing metadata (setup.py) ... done
ERROR: Could not find a version that satisfies the requirement opencv-python==4.2.0.32 (from versions: 3.4.0.14, 3.4.10.37, 3.4.11.39, 3.4.11.41, 3.4.11.43, 3.4.11.45, 3.4.13.47, 3.4.15.55, 3.4.16.57, 3.4.16.59, 3.4.17.61, 3.4.17.63, 3.4.18.65, 4.3.0.38, 4.4.0.40, 4.4.0.42, 4.4.0.44, 4.4.0.46, 4.5.1.48, 4.5.3.56, 4.5.4.58, 4.5.4.60, 4.5.5.62, 4.5.5.64, 4.6.0.66, 4.7.0.68, 4.7.0.72)
ERROR: No matching distribution found for opencv-python==4.2.0.32

It generated the .h5 model file okay. But when it tried to convert .h5 to .pb file, it had the following error messages:

2023-05-07 03:30:17.493609: I tensorflow/core/platform/cpu_feature_guard.cc:182] This TensorFlow binary is optimized to use available CPU instructions in performance-critical operations.
To enable the following instructions: AVX2 FMA, in other operations, rebuild TensorFlow with the appropriate compiler flags.
2023-05-07 03:30:18.517361: W tensorflow/compiler/tf2tensorrt/utils/py_utils.cc:38] TF-TRT Warning: Could not find TensorRT
Traceback (most recent call last):
File "/content/keras-YOLOv3-model-set/tools/model_converter/keras_to_tensorflow.py", line 23, in
from common.utils import get_custom_objects
File "/content/keras-YOLOv3-model-set/tools/model_converter/../../common/utils.py", line 13, in
from common.backbones.efficientnet import swish
File "/content/keras-YOLOv3-model-set/tools/model_converter/../../common/backbones/efficientnet.py", line 23, in
import keras_applications.imagenet_utils as keras_utils
ModuleNotFoundError: No module named 'keras_applications'

Please advise how to address these error messages.