I have an object I'm creating and sometimes it's not going to be created i.e. None.
I perform the following
dic.get("findThis") but since dic is sometimes None It will return AttributeError: 'NoneType' object has no attribute 'get'
There are a few solutions like checking the dic for existence using
if not dic:
print "MISSING"
else:
#do your stuff`.
What's a better way to do this?
Are you looking for a ternary operator?
result = dic.get("findThis") if dic else None
[dic.get("findThis"),dic.get("findThis2"),dic.get("findThis3"),dic.get("findThis4"),dic.get("findThis5"),dic.get("findThis6")], They should all return "MISSING" and not have to do a check for each.
dic is returned from a json response sometimes it's missing.if not x: x = {} Especially when passing empty parameters to a function or deserialising some values.You can use a defaultdict an use it like this:
import collections
#example function returning the dict
def get_dict_from_json_response():
return {'findThis2':'FOUND!'}
defdic = collections.defaultdict(lambda: 'MISSING')
#get your dict
dic = get_dict_from_json_response()
if dic:
defdic.update(dic) #copy values
dic = defdic #now use defaultdict
print [dic["findThis"],dic["findThis2"],dic["findThis3"],dic["findThis4"],dic["findThis5"],dic["findThis6"]]
Output:
['MISSING', 'FOUND!', 'MISSING', 'MISSING', 'MISSING', 'MISSING']
