# 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

专注于为中小企业提供成都网站制作、成都网站设计服务,电脑端+手机端+微信端的三站合一,更高效的管理,为中小企业海港免费做网站提供优质的服务。我们立足成都，凝聚了一批互联网行业人才，有力地推动了上1000+企业的稳健成长，帮助中小企业通过网站建设实现规模扩充和转变。

另外有需要云服务器可以了解下创新互联scvps.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。

网站题目：python光荣之路测试开发班list学习笔记-创新互联
本文URL：http://scyanting.com/article/eodps.html