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jaxtyping/docs/api/advanced-features.md
2024-02-25 12:07:01 +00:00

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# Advanced features
## Creating your own dtypes
::: jaxtyping.AbstractDtype
selection:
members:
false
## Printing axis bindings
::: jaxtyping.print_bindings
## Introspection
If you're writing your own type hint parser, then you may wish to detect if some Python object is a jaxtyping-provided type.
You can check for dtypes by doing `issubclass(x, AbstractDtype)`. For example, `issubclass(Float32, AbstractDtype)` will pass.
You can check for arrays by doing `issubclass(x, AbstractArray)`. Here, `AbstractArray` is the base class for all shape-and-dtype specified arrays, e.g. it's a base class for `Float32[Array, "foo"]`.
You can check for pytrees by doing `issubclass(x, PyTree)`. For example, `issubclass(PyTree[int], PyTree)` will pass.