gistfile1.py

class GuideMixin(object):
    """ Provides methods for parsing Rovi flat files. This class must be
        subclassed by SQLAlchemy model classes wishing to use the file loading.
    """
    flatfile = None
    #set to true if the table does contain a delta column
    nodelta = False

    @ClassProperty
    @classmethod
    def fieldorder(cls):
        """ Returns the column names in the order they are in the
            flat file.

            By default returns the column attribute names in order of definition.
            Elements set to None will be skipped.
        """
        fields = [col.name for col in cls.__table__.columns]
        fields.append(u'delta')
        return fields