Pythonic way to check if two dictionaries have the identical set of keys?

Question

For example, let's say I have to dictionaries:

d_1 = {'peter': 1, 'adam': 2, 'david': 3} 

and

d_2 = {'peter': 14, 'adam': 44, 'david': 33, 'alan': 21} 

What's the cleverest way to check whether the two dictionaries contain the same set of keys? In the example above, it should return False because d_2 contains the 'alan' key, which d_1 doesn't.

I am not interested in checking that the associated values match. Just want to make sure if the keys are same.

Answer 1

You can get the keys for a dictionary with dict.keys().

You can turn this into a set with set(dict.keys())

You can compare sets with ==

To sum up:

set(d_1.keys()) == set(d_2.keys()) 

will give you what you want.

Answer 2

In Python2,

set(d_1) == set(d_2) 

In Python3, you can do this which may be a tiny bit more efficient than creating sets

d1.keys() == d2.keys() 

although the Python2 way would work too