How to use the correct formula to generate features?

Matminer
1

Hello, I have a question. I used to generate features with this type of formula without error.
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But now that I use a formula with such an NCM structure, an error occurs when generating features.
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Here is the package I used to generate the feature. When I use the IonProperty() function, I get the following error.

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image1151×287 7.26 KB

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image1238×77 4.3 KB

Do I need to change the formula I’m using now, or how？ Thank you

2

My suggestion would be to convert your formulas to integer first using https://pymatgen.orgpymatgen.core.html/#pymatgen.core.composition.Composition.get_integer_formula_and_factor