Generating a Gaussian point spread function using Python

I wrote this function to generate a Gaussian point spread function using Python, I wonder if my approach is correct or needs modification.

I wrote this function, but not sure if my approach is correct:

def generate_PSF(size, sigma):
    """
    Generates a  Gaussian Point Spread Function (PSF).
    """
    x, y = np.meshgrid(np.linspace(-size/2, size/2, size), np.linspace(-size/2, size/2, size))
    d = np.sqrt(x*x + y*y)
    psf = np.exp(-d**2 / (2*sigma**2))
    psf /= np.sum(psf)  # Normalize the PSF
    return psf

source https://stackoverflow.com/questions/76745253/generating-a-gaussian-point-spread-function-using-python

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