title: TypeError: Object of type 'float32' is not JSON serializable
body: <p>I'm working with <code>numpy.float32</code> numbers and they don't go into <code>JSON</code>. What's the right approach to overcome this issue?   </p>
  
  <pre><code>import numpy as np
  import json
  
  a = np.float32(1)
  json.dumps(a)
  
  TypeError: Object of type 'float32' is not JSON serializable
  </code></pre>