title: cast numpy array into memmap
body: <p>I generate some data in my memory and I want to cast it into numpy.memmap to save up RAM. What should I do? my data is in:</p>
  
  <pre><code>    X_list_total_standardized=np.array(X_list_total_standardized)
  </code></pre>
  
  <p>I know that I could initialize an empty numpy.memmap:</p>
  
  <pre><code>X_list_total_standardized_memmap=np.memmap(self._prepared_data_location_npmemmap_X,dtype='float32',mode='w+')
  </code></pre>
  
  <p>What is the most convenient way to store X_list_total_standardized into the memmap? Thank you</p>
  
  <p>PS: would the following command be ok?</p>
  
  <pre><code>    X_list_total_standardized_memmap[:]=X_list_total_standardized[:]
  </code></pre>