How to set GeoPtProperty ?google app engine

Question

I have this model:

class location(ndb.Model):
      geoLocation = ndb.GeoPtProperty()

I am using this function to declare location model :

def careateLocationMode(cls,lon,lat):
        location1 = location()
        location1.geoLocation.lat = lat
        location1.geoLocation.lon = lon

but I got this error : NoneType' object has no attribute 'lat'

what's the problem ?

Answer 1

From NDB Document

You can construct one with two floats like ndb.GeoPt(52.37, 4.88) or with a string ndb.GeoPt("52.37, 4.88"). (This is actually the same class as db.GeoPt)

So the assignment is

location1.geoLocation = ndb.GeoPt(lat,lon)