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Edit: extending.py
""" Use cffi to access any of the underlying C functions from distributions.h """ import os import numpy as np import cffi from .parse import parse_distributions_h ffi = cffi.FFI() inc_dir = os.path.join(np.get_include(), 'numpy') # Basic numpy types ffi.cdef(''' typedef intptr_t npy_intp; typedef unsigned char npy_bool; ''') parse_distributions_h(ffi, inc_dir) lib = ffi.dlopen(np.random._generator.__file__) # Compare the distributions.h random_standard_normal_fill to # Generator.standard_random bit_gen = np.random.PCG64() rng = np.random.Generator(bit_gen) state = bit_gen.state interface = rng.bit_generator.cffi n = 100 vals_cffi = ffi.new('double[%d]' % n) lib.random_standard_normal_fill(interface.bit_generator, n, vals_cffi) # reset the state bit_gen.state = state vals = rng.standard_normal(n) for i in range(n): assert vals[i] == vals_cffi[i]
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