Fix south migration problem caused by 0003_update_keys_to_textversion using TextVersion model which is updated only in 0010_auto__add_field_textversion_category_1__add_field_textversion_category, same with 0007_populate_id_key_in_comments using Comment model updated in 0011_auto__add_field_comment_category.

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def update(obj, kwargs):

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    """

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    Update obj attributes with values from kwargs

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    """

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    for k,v in kwargs.items():

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        if hasattr(obj,k):

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            setattr(obj,k,v)

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