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books = {

"1984": "George Orwell",

"To Kill a Mockingbird": "Harper Lee",

"The Great Gatsby": "F. Scott Fitzgerald"

}

# handle KeyError explicitly

try:

# Try to access the key "Brave New World"

author = books["Brave New World"]

# Catch the KeyError if the key does not exist

except KeyError:

author = "Book not found"

print(author)

# Try to get the value for "Brave New World"

author = books.get("Brave New World", "Book not found")

print(author)

# use defaultdict to handle missing keys natively

from collections import defaultdict

books_default = defaultdict(lambda: "Book not found",books)

# Access the key "Brave New World"

author = books_default["Brave New World"]

print(author)