{% for key in keys %}
   <th>
      <div class="card-body">
         <label for="{{ key }}">Should We import this column?</label>
         <input id="{{ key }}" name="import[]" value="{{ key }}" type="checkbox">
      </div>
   </th>
{% endfor %}

<input id="name" name="import[]" value="name" type="checkbox">
<input id="name" name="import[]" value="email" type="checkbox">
<input id="name" name="import[]" value="category" type="checkbox">

# from request.POST array

'import[]' = 'email' # whichever I selected last

import = [
   'email',
   'name'
]