Python Coding challenge - Day 631| What is the output of the following Python Code?

 

Code Explanation:

1. Importing Counter

from collections import Counter

What it does:

Imports the Counter class from Python’s collections module.

Counter is a specialized dictionary subclass used for counting hashable objects like strings, lists, etc.

2. Defining the letter_counts() Function

def letter_counts(word):

What it does:

Defines a function letter_counts that takes a single argument word (a string).

The purpose of this function is to count the frequency of each letter in the word.

3. Creating a Counter Object

    c = Counter(word)

What it does:

Creates a Counter object named c.

It automatically counts how many times each letter appears in word.

Example:

If word = "apple", then:

c = Counter("apple")

Result:

Counter({'p': 2, 'a': 1, 'l': 1, 'e': 1})

4. Iterating Over Items in the Counter

    for k, v in c.items():

What it does:

Loops through each key-value pair in the Counter.

k is the letter, v is the count.

5. Yielding Each Letter and Its Count

        yield k, v

What it does:

This is a generator statement.

It yields a tuple (k, v) for each letter and its count instead of returning a full dictionary at once.

This makes the function memory-efficient, especially for long texts.

6. Calling the Function and Converting to Dictionary

print(dict(letter_counts("apple")))

What it does:

Calls the letter_counts("apple") function.

Since the function yields values, it returns a generator.

dict(...) converts the generator output into a full dictionary.

The result is printed.

Final Output

{'a': 1, 'p': 2, 'l': 1, 'e': 1}

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