project of punjab

[Alpna Lohia]

Respected sir,

      I am working on QGIS software . My project is based on PUNJAB , i want to change my attribute null value as a name . Like in below i will show you screen shots of my project where is attribute named and null value will showing you. so please sir i want the code in sparql python language which change my null value with name.

1.  Punjab Project in QGIS.

2. Punjab attribute named value and null values.

Thank you

 Alpna Lohia