in and count

Learn membership with in and counting with count.

in checks whether an item is in the list. count counts how many of an item exist:

cart = ["Apple", "Bread", "Apple"]
print("Apple" in cart)    # True
print(cart.count("Apple"))  # 2

in returns True/False; count returns a number. These methods are very handy for content searches.

Searching and counting

in and count are useful together: first check whether the item exists with in, then count how many with count:

cart = ["Apple", "Bread", "Apple", "Milk"]
if "Apple" in cart:
    print("Has Apple:", cart.count("Apple"))

This pattern is common in stock control and content search.

Assign cart = ["Apple", "Bread", "Apple"]. Print print("Apple" in cart) and print(cart.count("Apple")).

Show example solution

cart = ["Apple", "Bread", "Apple"]
print("Apple" in cart)
print(cart.count("Apple"))

Complete the in check

cart = ["Apple", "Bread"]
print("Apple" ____ cart)

Show answer

cart = ["Apple", "Bread"]
print("Apple" in cart)