pip install numpy==2.1.0
pip install -i https://test.pypi.org/simple/ quaddtype
import numpy as np
from numpy_quaddtype import QuadPrecDType, QuadPrecision
# using sleef backend (default)
np.array([1,2,3], dtype=QuadPrecDType())
np.array([1,2,3], dtype=QuadPrecDType("sleef"))
# using longdouble backend
np.array([1,2,3], dtype=QuadPrecDType("longdouble"))