OpenMP for Python in Numba
Run build.sh.
Import Numba and add the njit decorator to the function in which you want to use OpenMP. Add with contexts for each OpenMP region you want to have where the with context is openmp_context from the numba.openmp module.
from numba import njit
from numba.openmp import openmp_context as openmp
@njit
def test_pi_loop():
num_steps = 100000
step = 1.0 / num_steps
the_sum = 0.0
omp_set_num_threads(4)
with openmp("parallel"):
with openmp("for reduction(+:the_sum) schedule(static)"):
for j in range(num_steps):
c = step
x = ((j-1) - 0.5) * step
the_sum += 4.0 / (1.0 + x * x)
pi = step * the_sum
return pi
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