title: Python-saving matrix after all iterations
body: <p>by this command i can save result:</p>
  
  <pre><code>np.savetxt('Result.txt', phi)
  </code></pre>
  
  <p>, but i want to save this file hundred times. for example i have 100 iteration, with different phi-s, and i want to save hundred files:</p>
  
  <pre><code>Result1.txt,
  Result2.txt,
  .
  .
  .
  Result100.txt.
  </code></pre>