Tensorflow Object Detection API 2 - tensorflow

Question

I'm new to tf object detection api 2.
After training the model you can run an evaluation process to check the accuracy of the model.
But when I tried to run I got the below error. I'm using the backbone as an efficientDet.
I was able to run the evaluation for scaling resolution 512 but 640 is failing with the below error.
This is the python file I called and ended up with the below error.
enter code here /tensorflow/models/research/object_detection/model_main_tf2.py
`enter code here`enter code here`Call arguments received:
• inputs=tf.Tensor(shape=(1, 480, 640, 3), dtype=float32)
• kwargs={'training': 'False'}
exception.
INFO:tensorflow:A replica probably exhausted all examples. Skipping pending examples on other replicas.
I0719 06:49:27.115007 140042699994880 model_lib_v2.py:943] A replica probably exhausted all examples. Skipping pending e
xamples on other replicas.
Traceback (most recent call last):
File "/home/pictcompute/effient_net_ve/tensorflow/models/research/object_detection/model_main_tf2.py", line 115, in <m
odule>
tf.compat.v1.app.run()
File "/home/pictcompute/effient_net_ve/lib/python3.8/site-packages/tensorflow/python/platform/app.py", line 36, in run
_run(main=main, argv=argv, flags_parser=_parse_flags_tolerate_undef)
File "/home/pictcompute/effient_net_ve/lib/python3.8/site-packages/absl/app.py", line 312, in run
_run_main(main, args)
File "/home/pictcompute/effient_net_ve/lib/python3.8/site-packages/absl/app.py", line 258, in _run_main
sys.exit(main(argv))
File "/home/pictcompute/effient_net_ve/tensorflow/models/research/object_detection/model_main_tf2.py", line 82, in mai
n
model_lib_v2.eval_continuously(
File "/home/pictcompute/effient_net_ve/lib/python3.8/site-packages/object_detection/model_lib_v2.py", line 1159, in ev
al_continuously
eager_eval_loop(
File "/home/pictcompute/effient_net_ve/lib/python3.8/site-packages/object_detection/model_lib_v2.py", line 1009, in ea
ger_eval_loop
for evaluator in evaluators:
TypeError: 'NoneType' object is not iterable
Highly appreciate your help.
Thanks

Answer 1

The error occurs when you try to iterate over a None value. For example
mylist = None
for x in mylist:
print(x)
TypeError Traceback (most recent call last)
<ipython-input-2-a63d8b17c4a7> in <module>
1 mylist = None
2
----> 3 for x in mylist:
4 print(x)
TypeError: 'NoneType' object is not iterable
The error can be avoided by checking if a value is None or not before iterating over it. Thank You.