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dft_tools/doc/reference/python/random/random.rst

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.. index:: Random number generator
.. module:: pytriqs.random_generator
.. _random_generator:
Random generator class
======================
TRIQS exposes to python the random number generators used in C++,
in the module ``RandomGenerator``.
The generators are the boost random generators.
Usage
-----
The generator is constructed from a name (the name of the boost generator) and a seed::
from pytriqs.random_generator import *
r = RandomGenerator("mt19937", 237849)
A list of available random generators is obtained with::
print random_generator_names_list()
Then you can either generate float number on the interval :math:`[0,1[`
simply by calling the generator, or integer numbers in the inverval :math:`[0,N-1]` by calling
it with `N` ::
print r()
print r(10)
Example
-------
Here's a simple example showing how to use the generator.
.. plot:: reference/python/random/random.py
:include-source:
:scale: 70
Complete reference
------------------
.. autoclass:: pytriqs.random_generator.RandomGenerator
:members:
.. autofunction:: pytriqs.random_generator.random_generator_names_list