(1) 创建一个Library的类的实例，myLittleLibrary,其中预存有以下三本书： Java程序设计，张三著，45元 Java核心设计，李四著，50元 Java程序设计，王五著，38元

class Book:
def __init__(self, title, author, price):
self.title = title
self.author = author
self.price = price

class Library:
def __init__(self, books):
self.books = books

def display_books(self):
for book in self.books:
print(f"{book.title}, {book.author}著，{book.price}元")

books = [
Book("Java程序设计", "张三", 45),
Book("Java核心设计", "李四", 50),
Book("Java程序设计", "王五", 38)
]

myLittleLibrary = Library(books)
myLittleLibrary.display_books()