training_progress.json can be an invalid json

[nqbao]

Describe the bug

I ran ludwig w/o a dev set and look like it generate a json file with Infinity / -Infinity, which is not json valid

    "best_eval_metric_value": -Infinity,
    "best_eval_test_metrics": {},
    "best_eval_train_metrics": {},
    "best_eval_validation_metrics": {},
    "best_increase_batch_size_eval_metric": Infinity,

To Reproduce
Steps to reproduce the behavior:

ludwig train --config train.yml --training_set train.csv --test_set test.csv

try training_progress.json with tools such as jq or something

Expected behavior

Environment (please complete the following information):

• OS: [e.g. iOS]
• Version [e.g. 22]
• Python version:
• Ludwig version 10.0.23

Additional context
n/a

[mhabedank]

Hi @nqbao thanks for sharing the issue. I will have a look into it.

Context:
https://ecma-international.org/wp-content/uploads/ECMA-404_2nd_edition_december_2017.pdf
Page 4 (PDF: 12)

Numeric values that cannot be represented as sequences of digits (such as Infinity and NaN) are not
permitted.

[mhabedank]

Related? #3751