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https://github.com/triqs/dft_tools
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2921cbcc06
A trivial cythonized version of the c++ random_generator class. Useful to get the names of the generators from the python. new file: pytriqs/random/* new file: doc/reference/python/random/*
50 lines
1.4 KiB
Cython
50 lines
1.4 KiB
Cython
from dcomplex cimport *
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from libcpp.string cimport string
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# The c++ random generator class
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# We wrap two members only
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cdef extern from "triqs/mc_tools/random_generator.hpp":
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cdef cppclass random_generator "triqs::mc_tools::random_generator":
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random_generator(string, long) except +
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double operator() () except +
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int operator() (int) except +
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# This is the wrapping of the static member random_generator_names
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# It is a bit of a hack but there is no notion of ststic members in cython
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cdef extern from "triqs/mc_tools/random_generator.hpp" namespace "triqs::mc_tools::random_generator":
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string random_generator_names(string) except +
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# The python RandomGenerator class
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cdef class RandomGenerator:
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cdef random_generator * _c
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def __init__(self, name, seed):
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"""This is a random number generator class based on boost.
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:param name: (string) Name of the random number generator
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:param seed: (int) Random number seed
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"""
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self._c = new random_generator(name, seed)
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def __dealloc__(self):
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del self._c
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def rand(self):
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"""Generate a float random number in [0,1["""
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return self._c[0]()
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def int_rand(self, N):
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"""Generate an integer random number in [0,N-1]"""
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return self._c[0](N)
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# The list of generator names accessed through the static member
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def available_generator_names():
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"""Get a list of available random generator names"""
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return random_generator_names(",").split(',')
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