Question

I’m going through my collection and returning coordinate information, however when it hits an empty record it throws this error:

a=get_coords(doc['coordinates']['coordinates'])
print a

This is the function get_coords:

def get_coords(doc):
    if doc == None:
        pass
    else:
        longs, lat = doc

        return lat, longs

The error:

TypeError: 'NoneType' object has no attribute '__getitem__'

This then stops my query and no further records are returned.

How can I prevent this from happening, what I mean is I still want it to carry on searching for other records rather than stopping with this error message.

Thanks

Thanks for both answers they both helped. I was able to get it done by:

if doc['coordinates']==None:
    pass
else: 
    b=get_coords(doc['coordinates']['coordinates'])
    print b

I do this after first checking that there is indeed a doc in the collection. It now seems to print all existing coordinates in the collection.

Thanks

Answer 1

I’m not sure why you’re printing b, since that’s not defined in the above code. Maybe you mean a?

Either way, you should be able to do:

if doc==None:
   pass
else:
   a=get_coords(doc['coordinates']['coordinates'])
   print b

or whatever you want to do with doc. If some doc items don’t have coordinates you’ll need to do something similar for that.