Built-in practice: map()

In this exercise, you'll practice using Python's built-in map() function to apply a function to every element of an object. Let's look at a list of party guests:

names = ['Jerry', 'Kramer', 'Elaine', 'George', 'Newman']

Suppose you wanted to create a new list (called names_uppercase) that converted all the letters in each name to uppercase. you could accomplish this with the below for loop:

names_uppercase = []

for name in names:
  names_uppercase.append(name.upper())

['JERRY', 'KRAMER', 'ELAINE', 'GEORGE', 'NEWMAN']

Let's explore using the map() function to do this more efficiently in one line of code.

Use map() and the method str.upper() to convert each name in the list names to uppercase. Save this to the variable names_map.
Print the data type of names_map.
Unpack the contents of names_map into a list called names_uppercase using the star character (*).
Print names_uppercase and observe its contents.

Take Hint (-30 XP)

Exercise

Built-in practice: map()

Instructions