Python cookbook (data structure and algorithm) is used to find the similarities between the two dictionaries.

Python cookbook (data structure and algorithm) is used to find the similarities between the two dictionaries.

This example describes how to find the similarities between two dictionaries in Python. We will share this with you for your reference. The details are as follows:

Problem:Find the same places in the two dictionaries (the same key, the same value, etc)

Solution:Passkeys()Oritems()Methods To perform common set operations (such as Union, intersection, and difference set)

>>> A = {'X': 1, 'y': 2, 'z': 3 }>>> B = {'ww ': 10, 'x ': 11, 'y': 2 }>>>. keys () & B. keys () # key intersection {'y', 'x'} >>>. keys ()-B. keys () # key difference set {'Z'} >>>. keys () | B. keys () # key Union {'ww ', 'y', 'x', 'z'}>. items () & B. items () {('y', 2) }>>>. items ()-B. items () {('Z', 3), ('x', 1) }>>. items () | B. items () {('ww ', 10), ('Z', 3), ('x', 1), ('x', 11 ), ('y', 2) >>>

These types of operations can also be used to modify or filter out the contents in the dictionary. For example:

>>> C = {key: a [key] for key in. keys ()-{'w', 'z'} # create a new dictionary to remove certain keys> c {'y': 2, 'x ': 1 }>>>

Summary:

Dictionarykeys()Method,items()Methods support set operations,values()Method is not supported. Because the dictionary does not guarantee that all values are unique from the value perspective, which leads to some set operations. However, you can perform this operation by converting the value to a set.

(The code is from Python Cookbook.)