Invalid return/yield value

[rudi-mac]

Hi,

I am trying to run this code on a GCP vm with 24 cpus and 1 gpu. The test_hyperopt.py script runs with no error messages but all 10 trials are terminated (Process finished with exit code 0).

When trying to perform the hyperparameter tuning, after a while I get the following Error for most trials:

2021-02-01 10:14:13,258 ERROR function_runner.py:254 -- Runner Thread raised error.
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 248, in run
self._entrypoint()
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 316, in entrypoint
self._status_reporter.get_checkpoint())
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 576, in _trainable_func
handle_output(output)
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 566, in handle_output
"Invalid return or yield value. Either return/yield "
ValueError: Invalid return or yield value. Either return/yield a single number or a dictionary object in your trainable function.
Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner
self.run()
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 267, in run
raise e
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 248, in run
self._entrypoint()
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 316, in entrypoint
self._status_reporter.get_checkpoint())
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 576, in _trainable_func
handle_output(output)
File "/usr/local/lib/python3.7/dist-packages/ray/tune/function_runner.py", line 566, in handle_output
"Invalid return or yield value. Either return/yield "
ValueError: Invalid return or yield value. Either return/yield a single number or a dictionary object in your trainable function.

What am I missing here?

Thanks a lot in advance!

[sekhaish]

Hi,
I am facing the same issue.
Were you able to solve?
if yes, could you please help me @rudi-mac @himanshurawlani