# coding=utf-8

book_list_in_library = []
ready_borrow_book_list = []
borrowed_book_list = []

menu_info = """
input 1:add new book to library
input 2:borrow book from library
input 3:list all books in library
input 4:list all borrowed books in library
input 5: list current books in library
input 6:lend a book
"""

def add_book():
    global book_list_in_library
    global ready_borrow_book_list
    book_name = raw_input("please input the book name to add:")
    book_list_in_library.append(book_name)
    ready_borrow_book_list.append(book_name)

def borrow_book():
    global ready_borrow_book_list
    global borrowed_book_list
    while 1:
        book_name = raw_input("please input the book name to borrow:")
        if book_name in ready_borrow_book_list:
            ready_borrow_book_list.remove(book_name)
            borrowed_book_list.append(book_name)
            print "borrow book done!"
            break
        else:
            print "the book you borrow does not exist,try again!"

def lend_book():
    global ready_borrow_book_list
    global borrowed_book_list
    while 1:
        book_name = raw_input("please input the book name to lend:")
        if book_name in borrowed_book_list:
            borrowed_book_list.remove(book_name)
            ready_borrow_book_list.append(book_name)
            print "lend book done!"
            break
        else:
            print "the book you lend does not exist,try again!"

while 1:
    print menu_info
    command = raw_input("please input your command:")
    if command == "1":
        add_book()
        print ready_borrow_book_list
        print book_list_in_library
        continue
    if command == "2":
        borrow_book()
    if command == "3":
        print "all books are :", book_list_in_library
    if command == "4":
        print "borrowed books are :", borrowed_book_list
    if command == "5":
        print "current books in library are :", ready_borrow_book_list
    if command == "6":
        lend_book()
    if command == "q":
        break

心得：把功能分解，一个方法一个实现

为鹰潭等地区用户提供了全套网页设计制作服务，及鹰潭网站建设行业解决方案。主营业务为网站设计制作、网站制作、鹰潭网站设计，以传统方式定制建设网站，并提供域名空间备案等一条龙服务，秉承以专业、用心的态度为用户提供真诚的服务。我们深信只要达到每一位用户的要求，就会得到认可，从而选择与我们长期合作。这样，我们也可以走得更远！

分享文章：python光荣之路测试开发班list学习笔记
链接地址：http://cdweb.net/article/pjihps.html