def _populate(self, json):
super(InvoiceItem, self)._populate(json)<EOL>self.from_date = datetime.strptime(json['<STR_LIT>'], DATE_FORMAT)<EOL>self.to_date = datetime.strptime(json['<STR_LIT:to>'], DATE_FORMAT)<EOL>
Allows population of "from_date" from the returned "from" attribute which
is a reserved word in python.  Also populates "to_date" to be complete.