import numpy as np

samples, spacing = np.linspace(-1.0, 1.0, num=5, retstep=True)
half_open = np.linspace(-1.0, 1.0, num=5, endpoint=False)
curve = samples**2

print("samples:", samples)
print("count:", samples.size)
print("spacing:", spacing)
print("dtype:", samples.dtype)
print("diffs:", np.diff(samples))
print("half-open:", half_open)
print("curve:", curve)