df =

   A  B
0  A  C
1  A  G
2  T  T
3  C  G
4  A  A
5  G  G

> print(df.to_html())


<table border="1" class="dataframe">
  <thead>
    <tr style="text-align: right;">
      <th></th>
      <th>A</th>
      <th>B</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th>0</th>
      <td>A</td>
      <td>C</td>
    </tr>
    <tr>
      <th>1</th>
      <td>A</td>
      <td>G</td>
    </tr>
    <tr>
      <th>2</th>
      <td>T</td>
      <td>T</td>
    </tr>
    <tr>
      <th>3</th>
      <td>C</td>
      <td>G</td>
    </tr>
    <tr>
      <th>4</th>
      <td>A</td>
      <td>A</td>
    </tr>
    <tr>
      <th>5</th>
      <td>G</td>
      <td>G</td>
    </tr>
  </tbody>
</table>