title: OpenPyxl: read input file and make output matrix using list or array
body: <p>Please help me to parse a file using OpenPyxl.</p>
  
  <p>I have an excel file like below:</p>
  
  <p>Input xlsx:</p>
  
  <pre class="lang-none prettyprint-override"><code>   A      B      C
  1 Tom    Red    True
  2 Tom    Red    False
  3 Marry  Green  False
  4 Marry  Green  True
  5 Babara Red    False
  </code></pre>
  
  <p>A+B could be a key to removing duplicate values. (e.g. Marry+Green, Tom+Red)
  Read Input file and make output file like below:</p>
  
  <p>Expected output xlsx:</p>
  
  <pre class="lang-none prettyprint-override"><code>   A      B        Result
  1 Tom    Red    True,False
  2 Marry  Green  False,True
  3 Babara Red    False
  </code></pre>
  
  <p>** value "True,False" in 1st row.</p>