Python Coding challenge - Day 554| What is the output of the following Python Code?

 

Code Explanation:

1. Import the argparse module

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import argparse

Purpose: Imports Python's built-in argparse module.

Use: This module is used to parse command-line arguments passed to a Python script.

2. Create the Argument Parser

parser = argparse.ArgumentParser()

Purpose: Initializes a new argument parser object.

Explanation: This object (parser) will be used to define the expected command-line arguments.

3. Add an Argument

parser.add_argument("--val", type=int, default=10)

Purpose: Defines a command-line argument --val.

Breakdown:

--val: This is the name of the argument.

type=int: The argument should be converted to an integer.

default=10: If --val is not provided, use 10 as the default.

4. Parse the Arguments

args = parser.parse_args(["--val", "5"])

Purpose: Parses a list of arguments as if they were passed on the command line.

Explanation:

Instead of reading from actual command-line input, this line simulates passing the argument --val 5.

The result is stored in the args variable as a namespace (an object with attributes).

5. Print the Argument Value

print(args.val)

Purpose: Prints the value of the val argument.

Output: 5 — since --val 5 was passed in the simulated command line.

Summary Output

The script simulates passing --val 5, parses it, and prints:

5

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