nan replace with 1.0

[xayam]

I wanted to know if it is possible to add a new functionality
when generating a formula (auto_symbolic) with nan values
​​so that all nan are replaced with the value 1.0?

I have a problem that nan values ​​appear in the trained model,
but I think it is not a coincidence given my loss function.
And I want to replace these nan with the number 1 and check the resulting formula.

Is it possible?