django/docs/ref/forms/formsets.txt

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Formset Functions
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.. module:: django.forms.formsets
   :synopsis: Django's functions for building formsets.

.. function:: formset_factory(form, formset=BaseFormSet, extra=1, can_order=False, can_delete=False, max_num=None, validate_max=False)

    Returns a ``FormSet`` class for the given ``form`` class.

    See :ref:`formsets` for example usage.

    .. versionchanged:: 1.6
    
    The ``validate_max`` parameter was added.