Python Coding challenge - Day 555| What is the output of the following Python Code?

 

Code Explanation:

1. Import the inspect module

import inspect

Purpose: The inspect module allows you to retrieve information about live objects—functions, classes, methods, etc.

Use here: We're going to use it to inspect the signature of a function.

2. Define a function

def f(x, y=2):

    return x + y

Function: f takes two parameters:

x: Required

y: Optional, with a default value of 2

3. Get the function signature

sig = inspect.signature(f)

Purpose: Retrieves a Signature object representing the call signature of f.

Now sig contains info about parameters x and y.

4. Access a parameter's default value

print(sig.parameters['y'].default)

sig.parameters: This is an ordered mapping (like a dictionary) of parameter names to Parameter objects.

sig.parameters['y']: Gets the Parameter object for y.

.default: Accesses the default value for that parameter.

Output

Since y=2 in the function definition:

2

That's what will be printed.

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