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2013-12-08T02:42:19.083
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<p>Here is some code that should get you well on your way:</p> <pre><code>import sys # Python 2/3 compatibility shim if sys.hexversion >= 0x3000000: inp = input rng = range else: inp = raw_input rng = xrange def get_int(prompt): while True: try: return int(inp(prompt)) except ValueError: pass class Book: @classmethod def from_prompt(cls): title = inp('Enter title: ').strip() author = inp('Enter author: ').strip() pages = get_int('Page count: ') date = inp('Publication date: ').strip() return cls(title, author, pages, date) def __init__(self, title, author, pages, date): self.title = title self.author = author self.pages = pages self.date = date def __str__(self): return "Book: {title}\nAuthor: {author}\nPage count: {pages}\nPublish Date: {date}".format( title=self.title, author=self.author, pages=self.pages, date=self.date ) class Library: def __init__(self, books=None): self.books = [] self.title_index = {} if books: for book in books: self.add(book) def add(self, book): self.books.append(book) self.title_index[book.title] = book def find_title(self, title): return self.title_index.get(title, None) def __str__(self): return '\n\n'.join(str(book) for book in self.books) def main(): # # You get to write this part, # but here are some code examples: # lib = Library() book1 = Book('Fun with Dick and Jane', 'May Hill Arbuthnot', 160, '1951') lib.add(book1) book2 = Book('The Adventures of Pinocchio', 'Carlo Collodi', 171, '1911') lib.add(book2) # prompt for book 3 information book3 = Book.from_prompt() lib.add(book3) # find a book and display its information print('='*30) print(lib.find_title('The Adventures of Pinocchio')) # display the whole library contents print('='*30) print(lib) if __name__=="__main__": main() </code></pre>
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1. POBeginner-level virtual library program troubles, how do I let the user create an array or 'def'?
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1. COThank you so much, this helps so very much! Thank you, thank you!
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