Map is a built-in function that takes a function and an iterable as arguments and applies the function to each element in the iterable.

map(function, iterable)

An iterable could be an object which can be iterated, such as — a list, tuple, etc.

The map function can be used to replace loops that are used to perform some operation on each element in a list. Here’s an example:

Example 1: Finding the square of numbers

## Traditional Loop

nums = (1, 3, 4, 5, 6, 7)

def square_numbers(nums):

squares = []

for num in nums:

squares.append(num**2)

## One-liner

squares = list(map(lambda x: x**2, nums))

Example 2: Consider the scenario where we have a list of sentences and want to count the number of words in each sentence. We can use a multi-line loop to achieve this as follows:

## Traditional Loop

sentences = ['This is the first sentence.',

'And this is the second sentence.',

'Finally, the third sentence.']

word_counts = []

for sentence in sentences:

words = sentence.split()

word_count = len(words)

word_counts.append(word_count)

### line liner

word_counts = list(map(lambda sentence: len(sentence.split()), sentences))