Fix Python – How to get the difference between two dictionaries in Python?

Question 1

I have two dictionaries, and I need to find the difference between the two, which should give me both a key and a value.

I have searched and found some addons/packages like datadiff and dictdiff-master, but when I try to import them in Python 2.7, it says that no such modules are defined.

I used a set here:

first_dict = {}
second_dict = {}
 
value = set(second_dict) - set(first_dict)
print value

My output is:

>>> set(['SCD-3547', 'SCD-3456'])

I am getting only keys, and I need to also get the values.

Question 2

Try the following snippet, using a dictionary comprehension:

value = { k : second_dict[k] for k in set(second_dict) - set(first_dict) }

In the above code we find the difference of the keys and then rebuild a dict taking the corresponding values.

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