Crate ferray_numpy_interop 

ferray-numpy-interop

A companion crate providing zero-copy (where possible) conversions between ferray arrays and external array ecosystems:

• NumPy (via PyO3) — feature "python"
• Apache Arrow — feature "arrow"
• Polars — feature "polars"

All three backends are feature-gated and disabled by default. Enable them in your Cargo.toml:

[dependencies.ferray-numpy-interop]
version = "0.1"
features = ["arrow"]  # or "python", "polars"

Design principles

1. Safety first — every conversion validates dtypes and memory layout before returning. No silent reinterpretation of memory.
2. Zero-copy when possible — C-contiguous arrays are shared without copying where the target format supports it.
3. Explicit errors — dtype mismatches, null values, and unsupported types produce clear FerrayError messages.

Modules

dtype_map

Mapping between ferray [DType], Arrow [DataType], and NumPy dtype codes.