Explanation:
1. Creating a List
nums = [1, 2, 3]
Explanation:
nums is a variable name.
[1, 2, 3] is a list in Python.
The list contains three integer elements: 1, 2, and 3.
This line stores the list inside the variable nums.
After execution:
nums → [1, 2, 3]
2. Applying the map() Function
result = map(lambda x: x+1, nums)
Explanation:
map() is a built-in Python function.
It is used to apply a function to every element of an iterable (like a list).
map() takes two arguments:
A function
An iterable (list, tuple, etc.)
In this line:
The function is lambda x: x+1
The iterable is nums
So map() will apply the function to each element in the list [1,2,3].
The result is stored in the variable result.
⚠️ Important:
map() returns a map object (iterator), not a list.
Example internal processing:
Element Operation Result
1 1 + 1 2
2 2 + 1 3
3 3 + 1 4
But these values are not shown yet because they are inside the map object.
3. Understanding the Lambda Function
Inside the map() function:
lambda x: x + 1
Explanation:
lambda is used to create a small anonymous function (function without a name).
x is the input value.
x + 1 means add 1 to the input value.
Example:
x x+1
1 2
2 3
3 4
4. Printing the Result
print(result)
Explanation:
This prints the map object, not the actual mapped values.
Because result is an iterator, Python shows its memory reference.
Output example:
<map object at 0x00000211B4D5C070>
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