13b-map-function.py

# The map() function in Python is a built-in function used to apply a given function to all items in an iterable (e.g., list, tuple) and return a map object, which can be converted to a list or other iterable types.

# Let's start with a simple example:

# Define a function to square a number
def square(x):
    return x ** 2

# Create a list of numbers
numbers = [1, 2, 3, 4, 5]

# Now suppose we want the square function to be applied on the every element of the list and add them in new list we can do it by - 
sq_list= [ square(numbers[0]),
square(numbers[1]),
square(numbers[2]) ] # And so on..... 

# But we can do this with map function in one line, Using the map() function to square each number in the list-
# map function returns map object and we cannot print that object directly so we have to store it in a list or tupple
squared_numbers_list = list(map(square, numbers))
# map(Name of the function without () , List name) , The map() function takes two arguments: the first argument is the function you want to apply to each item, and the second argument is the iterable you want to process.

# Printing the squared numbers
print(squared_numbers_list)

# You can also use lambda functions with map() for simple operations:

# Using lambda function to cube each number in the list
cubed_numbers = map(lambda x: x ** 3, numbers)

# Converting the result to a list
cubed_numbers_list = list(cubed_numbers)

# Printing the cubed numbers
print(cubed_numbers_list)

# The map() function is commonly used to transform data in iterables without using explicit loops. It's a powerful tool for data manipulation and processing.

# Note: In Python 3, map() returns a map object, so you often convert it to a list or another iterable type to see the results.