title: set very low values to zero in numpy
body: <p>In numpy I have an array like </p>
  
  <pre><code>[0 +  0.5j, 0.25 + 1.2352444e-24j, 0.25+ 0j, 2.46519033e-32 + 0j] 
  </code></pre>
  
  <p>what is the fastest and easiest way to set the super low value to zero to get </p>
  
  <pre><code>[0 +  0.5j, 0.25 + 0j, 0.25+ 0j, 0 + 0j] 
  </code></pre>
  
  <p>efficiency is not the paramount.</p>