Dimple Yadav, wife of Uttar Pradesh Chief Minister Akhilesh Yadav, today filed her nomination for the Lok Sabha by-election from Kannauj. Accompanied by her husband, 35-year-old Dimple, who suffered a humiliating defeat at the hands of Congress' Raj Babbar in the by-election for the Firozabad parliamentary seat in 2009, filed the papers before the returning officer.Congress General Secretary Digvijay Singh said that has decided not to field any candidate against Dimple in Kannauj. The Kannauj by-election, being held on June 24, has been necessitated following the resignation of Akhilesh Yadav after his election to the Legislative Council.