Code Explanation:
🔹 1. Importing starmap
from itertools import starmap
✅ Explanation
starmap() is imported from Python's itertools module.
It applies a function to each element of an iterable.
Unlike map(), starmap() automatically unpacks each tuple into separate arguments.
Think of it like opening a gift box before using what's inside.
Tuple
(2,3)
↓
Open the tuple
↓
2 , 3
↓
Pass to function
🔹 2. Creating the List of Tuples
pairs = [(2, 3), (4, 5)]
✅ Explanation
A list containing two tuples is created.
Current memory:
pairs
│
▼
[(2,3), (4,5)]
Each tuple contains the arguments that will be passed to the function.
Visual:
Tuple 1
(2,3)
Tuple 2
(4,5)
🔹 3. Calling starmap()
starmap(pow, pairs)
✅ Explanation
Syntax:
starmap(function, iterable)
Here,
Function → pow
Iterable → pairs
Python processes one tuple at a time.
Rule:
Take one tuple
↓
Unpack it
↓
Call the function
🔹 4. Understanding pow()
pow(a, b)
✅ Explanation
The pow() function calculates:
a ** b
Examples:
pow(2,3)
returns
8
because
2³ = 8
Similarly,
pow(4,5)
returns
1024
because
4⁵ = 1024
🔹 5. First Iteration
Current tuple:
(2, 3)
✅ Explanation
starmap() automatically unpacks it.
Internally:
pow(2,3)
Calculation:
2 × 2 × 2
↓
8
Current result:
[8]
Visual:
(2,3)
↓
2 , 3
↓
pow(2,3)
↓
8
🔹 6. Second Iteration
Current tuple:
(4,5)
✅ Explanation
Again, Python unpacks it.
Internally:
pow(4,5)
Calculation:
4 × 4 × 4 × 4 × 4
↓
1024
Current result:
[8,1024]
Visual:
(4,5)
↓
4 , 5
↓
pow(4,5)
↓
1024
🔹 7. Converting to a List
result = list(
starmap(pow, pairs)
)
✅ Explanation
starmap() returns an iterator.
list() collects all generated values.
Current memory:
result
│
▼
[8,1024]
🔹 8. Printing the Result
print(result)
✅ Explanation
Python prints the final list.
Output:
[8, 1024]
🎯 Final Output
[8, 1024]
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