title: Numpy: how I can determine if all elements of numpy array are equal to a number
body: <p>I need to know if all the elements of an array of <code>numpy</code> are equal to a number</p>
  
  <p>It would be like:</p>
  
  <pre><code>numbers = np.zeros(5) # array[0,0,0,0,0]
  print numbers.allEqual(0) # return True because all elements are 0
  </code></pre>
  
  <p>I can make an algorithm but, there is some method implemented in <code>numpy</code> library?</p>