CuNumpy

Simple wrapper for numpy and cupy. Replace import numpy as np with import cunumpy as xp.

Install

pip install cunumpy

Example usage:

export ARRAY_BACKEND=cupy

import cunumpy as xp

arr = xp.array([1, 2])

print(type(arr))
print(xp.__version__)

# Convert to NumPy
arr_np = xp.to_numpy(arr)

# Convert to active backend
arr_xp = xp.to_cunumpy(arr)

# Inspect backend
print(xp.get_backend(arr))
print(xp.is_gpu(arr))
print(xp.is_cpu(arr))

# Temporarily switch backend
with xp.use_backend("numpy"):
    # This code runs on CPU even if ARRAY_BACKEND=cupy
    arr_cpu = xp.zeros(100)

# Set backend globally
xp.set_backend("cupy")

# Synchronize GPU operations (no-op on CPU)
xp.synchronize()

Build docs

make html
cd ../
open docs/_build/html/index.html