ENH: impl random.pareto

[samir-nasibli]

Description

pareto(a[, size]) Draw samples from a Pareto II or Lomax distribution with specified shape.

TODO

• array_like of floats for a param
• tests for backend dpnp_rng_pareto_c

Reproduce

>>> a= 30.
>>> np.mean(dpnp.random.pareto(a, size=10**6)); np.mean(np.random.pareto(a, size=10**6))
1.0345331694970257
0.0345063959568665
>>> np.var(dpnp.random.pareto(a, size=10**6)); np.var(np.random.pareto(a, size=10**6))
0.0012693687866730547
0.0012701945158571334

Checklist

• Docstrings for all functions
• Gallery example in ./doc/examples (new features only)
• Unit tests:
• Clean style in the spirit of PEP8