# PySCF v3 API proposals

## Removing TaggedNPArray

### Passing additional keyword arguments

### Returning multiple values instead of the TaggedNPArray

### Global configuration to control the return style

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## Introducing a universal NumPy interface for various NumPy-compatible libraries

A general NumPy wrapper can be developed in PySCF to provide a universal interface to access NumPy functions. This interface would enable automatic switching to jax.numpy or torch functions depending on the runtime context.

This interface can be imported as:

import pyscf.numpy as fnp

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## Allowing extensions written in C++