Python Coding Challenge - Question with Answer (ID -101225)

 

Step-by-Step Explanation

✅ Step 1: Function Definition

def f(x): 
    return x + 1

This function:

• Takes one number x

• Returns x + 1

✅ Example:
f(1) → 2
f(5) → 6

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✅ Step 2: First map()

m = map(f, [1, 2, 3])

This applies f() to each element:

Original	After f(x)
1	2
2	3
3	4

 Important:

• map() does NOT execute immediately

• It creates a lazy iterator

So at this point:

m → (2, 3, 4) # not yet computed

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✅ Step 3: Second map()

m = map(f, m)

Now we apply f() again on the result of the first map:

First map	Second map
2	3
3	4
4	5

So the final values become:

(3, 4, 5)

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✅ Step 4: Convert to List

print(list(m))

This executes the lazy iterator and prints:

[3, 4, 5]

---

✅ Final Output

[3, 4, 5]

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