Python Coding challenge - Day 637| What is the output of the following Python Code?

 

Code Explanation:

1. Importing the os Module

import os

Purpose: Imports the built-in os module, which provides functions to interact with the operating system.

Usage here: We'll use os.listdir() to list files in a directory.

2. Defining a Function: file_gen(path)

def file_gen(path):

Purpose: Defines a generator function named file_gen that takes a single parameter path (which should be a directory path).

3. Creating and Returning a Generator Expression

    return (f for f in os.listdir(path)

            if f.endswith('.py'))

os.listdir(path): Lists all files and folders in the directory given by path.

for f in os.listdir(path): Iterates through every item (f) in that directory.

if f.endswith('.py'): Filters the items to only include files that end with .py (i.e., Python files).

Generator Expression: Instead of returning a full list, this line returns a generator, which produces .py filenames on demand (saves memory).

4. Printing the Type of Returned Object

print(type(file_gen('.')))

file_gen('.'): Calls the function with '.', which means the current directory.

type(...): Returns the type of the object returned by file_gen.

Expected Output:

<class 'generator'>

This shows that file_gen() returns a generator object, not a list or tuple.

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