[QGIS-Developer] NULL in field

[Giulio Fattori]

Hi all,

i have this simple field calc function:

from qgis.core import *
from qgis.gui import *

@qgsfunction(args='auto', group='Custom')
def fill_down(value1, feature, parent):

     k= 20
     if value1 == NULL:
         k = 10

     return k

it should return 10 if the field is empty but it doesn't work.

Any suggestions?

Best regards

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