How to assign an item/var as an updated dict

I have a code like this that assigns an item as dict that is an updated different dict:

lang1 = {1:'a',2:'b',3:'c'}
langs = {'lang1'：lang1,'lang2':lang1.update({3:'g'})}
print(langs['lang2'])

When I do that I got the output ‘None’. Is there anyway to do this so if I print(langs[lang2][3]) it gets ‘g’

>Solution :

dict.update does not return anything, it modifies the existing dict.
if you are using python 3.9 and up you can do

lang1 | {3:'g'}

if you are not then you can do:

{**lang1, 3:'g'}