title: Create a matrix with headers and inserting values by calling the headers
body: <p>Is it in python possible to create a zero-matrix with headers and insert values by calling column-header and row-headers? For example:</p>
  
  <pre><code># A B C
  d 0 0 0
  e 0 0 0
  f 0 0 0
  </code></pre>
  
  <p>the I write for example <code>matrix('A', 'd') = 1</code> and <code>matrix('B', 'e') = 3</code> and get</p>
  
  <pre><code># A B C
  d 1 0 0
  e 0 3 0
  f 0 0 0
  </code></pre>
  
  <p>And when I am done I want to be able to save it to csv.
  Hope someone can help me, because I have not idea if this is possible. </p>