Error during template rendering | Could not parse the remainder: '(pandas.NaT)' from 'pandas.isnull(pandas.NaT)'

I'm trying to display a dictionary via html in django app and that each value of dictionary is a dataframe.

I'm able to print key but not dataframe for which I've tried many different approaches.

Either I get key value pair printed which is not very human readable or I get Could not parse the remainder error

Here's snippet of views.py

            context = {'rail': rail}

            return render(request, 'sample_output.html', context)

where rail is my dictionary

Here's snippet of html

    <table>
        <thead>
            <tr>
                {% for key in rail.keys %}
                <th>{{ key }}</th>
                {% endfor %}
            </tr>
        </thead>
        <tbody style="height: 400px; overflow-y: scroll;">
            {% for key, value in rail.items %}
            <tr>
                <td>{{ key }}</td>
                <td>
                    <ul>
                        {% for index, row in value.iterrows %}
                        <tr>
                            {% for cell in row %}
                              <td>
                                {% if cell is not pandas.isnull(pandas.NaT) %}
                                    {{ cell }}
                                {% else %}
                                    NaT
                                {% endif %}
                              </td>
                            {% endfor %}
                          </tr>
                          {% endfor %}

                    </ul>
                </td>
            </tr>
            {% endfor %}
   
         </tbody>
    </table>

Use to_html() with safe filter:

context = {'rail': {k: v.to_html() for k, v in rail.items()}}

For each dataframe, in your template use <td>{{ value|safe }}</td>

Example:

df = pd.DataFrame({'col1': [1, 2], 'col2': [3, 4]})
print(df.to_html())

# Output
<table border="1" class="dataframe">
  <thead>
    <tr style="text-align: right;">
      <th></th>
      <th>col1</th>
      <th>col2</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th>0</th>
      <td>1</td>
      <td>3</td>
    </tr>
    <tr>
      <th>1</th>
      <td>2</td>
      <td>4</td>
    </tr>
  </tbody>
</table>