Python课程设计:图书馆管理系统_python图书信息管理系统课设

图书馆管理系统:

基于python系统

引用库进行操作

系统主要实现：

1. 添加书
2. 删除书
3. 借书
4. 还书
5. 查询图书信息
6. 查询马上要归还的图书信息
7. 按照借阅次序排序

源码简介:

1. 对已图书信息进行更新操作，包括添加和删除一种书的信息，修改图书信息（例如图书被借阅，书的数目减1，借阅次数加1，如果数量为0则状态为不可借）；
2. 通过按图书的名称查询图书信息；
3. 显示所有即将到期的图书进行排序；
4. 将图书的所有相关信息内容存为文件。

源码运用:

运用到了python知识，在Python中，lambda函数是使用lambda表达式定义的单行匿名函数。它常用于将函数作为参数传递等场景。lambda函数具有lambda<参数>:<表达式>的格式。它没有函数名，函数体只有一条语句，这条语句的结果就是该函数的返回值。

整个代码中反复使用了for循环

[:-1]是python特有的切片操作，也叫切割操作，这里的下标0表示左起第一个元素，-1表示倒数最后一个元素。取一个list或tuple的部分元素是非常常见的操作

mode=”w+”表示即可以写数据又可以读取数据

<小总结>

用来应付大一大二python课程设计绰绰有余

以下代码仅供参考!并不完整!

可以私信

(全天25小时在线)

import datetime
 
 
book_info = ["索引", "名称", "地址", "类别", "数量", "价格", "入库时间", "归还时间", "次数", "状态"]
book_info1 = [1, "红楼梦", "图书馆A1", "人文", 1, 22, datetime.datetime(2018, 1, 1), datetime.datetime(2018, 1, 1), 1, "可借"]
book_info2 = [2, "西游记", "图书馆A2", "人文", 1, 22, datetime.datetime(2018, 1, 1), datetime.datetime(2018, 1, 1), 2, "可借"]
book_info3 = [3, "水浒传", "图书馆A3", "人文", 1, 22, datetime.datetime(2018, 1, 1), datetime.datetime(2018, 1, 1), 3, "可借"]
all_book_info = [book_info1, book_info2, book_info3]
 
 
def add_book(_book_info, mode="a+"):
    f = open(r'lib.txt', mode)
    print(_book_info, file=f)
    f.close()
 
def renew_books(_all_books):
    for index, _book in enumerate(_all_books):
        if index == 0:
            add_book(_book, mode="w+")
        else:
            add_book(_book)
 
def read_books():
    f = open(r'lib.txt', "r")
    _books_info = f.read()
    _books_info_str = _books_info.split("\n")[:-1]
    _return_info = []
    for _book in _books_info_str:
        _return_info.append(eval(_book))
    f.close()
 
    return _return_info
 
 
print("1.添加书")
print("2.删除书")
print("3.借书")
print("4.还书")
print("5.查询图书信息")
print("6.查询马上要归还的图书信息")
print("7.按照借阅次数排序")
print("************")
do_now = int(input("你想做什么呢？(输入为数字)"))
 
# book_info = ["索引", "名称", "地址", "类别", "数量", "价格", "入库时间", "归还时间", "次数", "状态"]
# datetime.datetime(2018, 1, 1)
if do_now == 1:
    print("1.添加书")
    the_add_book = []
    for info in book_info:
        # int
        if info in ["索引", "数量", "价格", "次数"]:
            put_number = int(input(info + ":"))
            the_add_book.append(put_number)
        # datetime
        elif info in ["入库时间", "归还时间"]:
            put_date = input(info + ":(用逗号分开年月日)").split(",")
            the_add_book.append(datetime.datetime(int(put_date[0]), int(put_date[1]), int(put_date[2])))
        # str
        else:
            put_txt = input(info + ":")
            the_add_book.append(put_txt)
    add_book(the_add_book)
 
elif do_now == 2:
    # 读取所有书
    all_book_info = read_books()
    # 把所有书名打出
    for _book in all_book_info:
        print(_book[1])
    del_book_name = input("你想删除哪一本书？")
 
    # stay_book -> 最后留下来的书
    stay_book = []
    for _book in all_book_info:
        if del_book_name != _book[1]:
            stay_book.append(_book)
    renew_books(stay_book)
 
elif do_now == 3:
    # 读取所有书
    all_book_info = read_books()
    # 把所有书名打出
    for _book in all_book_info:
        if "不" not in _book[-1]:
            print(_book[1])
    borrow_book_name = input("你想借哪一本书？")
    for _book in all_book_info:
        if borrow_book_name == _book[1]:
            _book[4] = _book[4] - 1
            _book[-2] = _book[-2] + 1
            if _book[4] == 0:
                _book[-1] = "不可借"
    renew_books(all_book_info)
 
elif do_now == 4:
    # 读取所有书
    all_book_info = read_books()
    # 把所有书名打出
    for _book in all_book_info:
        print(_book[1])
    return_book_name = input("你想还哪一本书？")
    for _book in all_book_info:
        if return_book_name == _book[1]:
            _book[4] = _book[4] + 1
            if _book[4] == 1:
                _book[-1] = "可借"
    renew_books(all_book_info)
 
elif do_now == 5:
    # 读取所有书
    all_book_info = read_books()
    # 把所有书名打出
    for _book in all_book_info:
        print(_book[1])
    search_book_name = input("你想查询哪一本书？")
    for _book in all_book_info:
        if search_book_name == _book[1]:
            print(_book)
    renew_books(all_book_info)
 
elif do_now == 6:
    all_book_info = read_books()
    # 把所有书名打出
    for _book in all_book_info:
        # datetime.datetime.now() ->获取当前日期
        if datetime.datetime.now() - _book[-3] > datetimetimedelta(days=3):
            print(_book[1], datetime.datetime.now() - _book[-3])
 
elif do_now == 7:
    all_book_info = read_books()
    all_book_info.sort(key=lambda x: x[-2] * -1)
    for _book in all_book_info:
        print(_book[1])