Public Questions for tag [dictionary]

I am a bit puzzled by the following code:d = {'x': 1, 'y': 2, 'z': 3} for key in d: print (key, 'corresponds to', d[key])What I don't understand is the key portion. How does Python recognize th

I have two Python dictionaries, and I want to write a single expression that returns these two dictionaries, merged (i.e. taking the union). The update() the method would be what I need if it returned