Python Coding Challange - Question With Answer(01070125)

 

Explanation:

1. Define the List nums:

   nums = [1, 2, 3, 4]

   • A list named nums is created with the elements [1, 2, 3, 4].

2. Using the map() Function:

   result = map(lambda x, y: x + y, nums, nums)

   • map() Function:
     • The map() function applies a given function (in this case, a lambda) to the elements of one or more iterables (like lists, tuples, etc.).
     • Here, two iterables are passed to map()—both are nums.
   • lambda Function:
     • The lambda function takes two arguments x and y and returns their sum (x + y).
   • How It Works:
     • The map() function pairs the elements of nums with themselves because both iterables are the same: $$[(1, 1), (2, 2), (3, 3), (4, 4)]$$
     • The lambda function is applied to each pair: $$x = 1, y = 1 \Rightarrow 1 + 1 = 2$$ $$x = 2, y = 2 \Rightarrow 2 + 2 = 4$$ $$x = 3, y = 3 \Rightarrow 3 + 3 = 6$$ $$x = 4, y = 4 \Rightarrow 4 + 4 = 8$$

3. Convert the map Object to a List:

   print(list(result))

   • The map() function returns a map object (an iterator-like object) in Python 3.
   • Using list(result), the map object is converted to a list: $$[2, 4, 6, 8]$$

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Final Output:

[2, 4, 6, 8]

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Summary:

• The code adds corresponding elements of the list nums with itself.
• The map() function applies the lambda function pairwise to the elements of the two nums lists.
• The result is [2, 4, 6, 8].