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from cython.parallel import parallel, prange
import cython
from cython.cimports.libc.math import sqrt
@cython.boundscheck(False)
@cython.wraparound(False)
def normalize(x: cython.double[:]):
i: cython.Py_ssize_t
total: cython.double = 0
norm: cython.double
with cython.nogil, parallel():
for i in prange(x.shape[0]):
total += x[i]*x[i]
norm = sqrt(total)
for i in prange(x.shape[0]):
x[i] /= norm
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