Im running my script in ArcGIS 10.2 and the dialog window says completed, but the empty fields in the 'SoilsType' row of the 'mSoils' Feature Class aren't getting populated with the values from the 'SoilsType' field from the 'mLanduse' Feature Class.
cur = arcpy.da.SearchCursor(mLanduse, lField)
for row in cur:
cur2 = arcpy.da.UpdateCursor(mSoils, sField)
for row2 in cur2:
if row2[0] == '' or row2[0] is None:
row2[0] = lField
cur2.updateRow(row2)
query
and the syntax you are using there.