title: parse string into columns
body: <p>I have a column called &quot;name&quot;. It is of type string. It looks something like this :</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th style="text-align: left;">name</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td style="text-align: left;">attr1=val1a; attr2=val2a; attr3=val3a; attr4=val4a</td>
  </tr>
  <tr>
  <td style="text-align: left;">attr1=val1b; attr5=val5b; attr3=val3b; attr6=val6b</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>I want to resolve this column into :</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th style="text-align: left;">attr1</th>
  <th style="text-align: left;">attr2</th>
  <th style="text-align: left;">attr3</th>
  <th style="text-align: left;">attr4</th>
  <th style="text-align: left;">attr5</th>
  <th style="text-align: left;">attr6</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td style="text-align: left;">val1a</td>
  <td style="text-align: left;">val2a</td>
  <td style="text-align: left;">val3a</td>
  <td style="text-align: left;">val4a</td>
  <td style="text-align: left;">Null</td>
  <td style="text-align: left;">Null</td>
  </tr>
  <tr>
  <td style="text-align: left;">val1b</td>
  <td style="text-align: left;">Null</td>
  <td style="text-align: left;">val3b</td>
  <td style="text-align: left;">Null</td>
  <td style="text-align: left;">val5b</td>
  <td style="text-align: left;">val6b</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>Can someone help me find a way to do this in python.</p>
  <p>Thanks in advance!</p>