How can I efficiently quantify the number of equal key-value pairs in two Python dictionaries?

Checking Equality of Key-Value Pairs in Dictionaries for Quantified Analysis

In Python, comparing dictionaries for value equality can be achieved using various approaches. A common method involves iterating over the items of the dictionaries and comparing them directly. However, for a more elegant solution that quantifies the number of equal key-value pairs, consider the following approach:

Create a new dictionary, shared_items, that contains only the key-value pairs that are present in both dictionaries and have equal values:

shared_items = {k: x[k] for k in x if k in y and x[k] == y[k]}

Here, a dictionary comprehension is used to filter the items in x and select only the keys that also exist in y and have the same value.

To quantify the number of equal pairs, simply obtain the length of the shared_items dictionary:

print(len(shared_items))

This concise and expressive solution provides both the equality check and the count of matching pairs, eliminating the need for explicit loops and manual comparisons.

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