set very low values to zero in numpy

Question

In numpy I have an array like

[0 +  0.5j, 0.25 + 1.2352444e-24j, 0.25+ 0j, 2.46519033e-32 + 0j] 

what is the fastest and easiest way to se

Answer 1

If all numbers have small imaginary parts, and you only want to suppress these then you can use

b=np.real_if_close(a)

Otherwise the suggestion by DSM is the way forward, i.e.

a.real[abs(a.real)<1e-13]=0
a.imag[abs(a.imag)<1e-13]=0