what format is needed when importing old data?

edit

I would write a Python code iterating over your data which:

• creates users using Django user creation api.

• posts questions, answers and comments as below

  from askbot.models import User
  u = User.objects.get(email='user@example.com')
  q = u.post_question(title='my title', body_text='my text in markdown format', tags='tag1 tag2 tag3')
  u.post_answer(question=q, body_text='my answer body text')
  u.post_comment(parent_post=q, body_text='my comment body text')