Python簡易版圖書管理系統(tǒng)

"""
圖書管理系統(tǒng)
"""
import random

# books={書名:剩余數(shù)量, 書名:剩余數(shù)量}
import time

books = {"防脫發(fā)指南": 5, "頸椎康復(fù)指南": 3, "從刪庫到跑路": 0}
# students_books=[name,{書}]
students_books = {"趙路遙": []}


class book(object):
 """先傳一個書名,以后可根據(jù)需要傳 開始借書時間,書的詳細(xì)信息,以及之前借書的人等等"""

 def __init__(self, bookname):
 super(book, self).__init__()
 self.bookname = bookname

 def getBookName(self):
 return self.bookname


if __name__ == "__main__":
 print("*" * 50)
 print("歡迎來到遙遙哥的圖書館".center(50))
 print("*" * 50)
 while True:
 choices = input("""  請選擇你所需要的功能
1.查詢書籍 2.借書 3.還書 4.顯示所有書籍 5.查詢用戶所借的書 6.退出系統(tǒng):""")
 if choices == '1':
  # 查詢書籍
  print('--------查詢書籍---------')
  search_book = input('請輸入要查詢的書籍名稱:')
  # 遍歷books
  for book in books.keys():
  if search_book in book:
   print("正在查找,請稍等")
   time.sleep(1)
   if books[search_book] > 0:
   print("你說查找的書,目前還有{}本".format(books[search_book]))
   break
   else:
   print("你所查找的書,已經(jīng)借完,請過段時間之后再來")
   break
  else:
  print("對不起你所輸入的書不存在,可聯(lián)系管理員補(bǔ)充")

 elif choices == '2':
  # 借書
  print("歡迎來到借書頁面".center(50))
  flag = True
  while flag:
  user_name = input("請輸入用戶名")
  borrow_book = input("請輸入你所借的書名")
  for book in books.keys():
   if borrow_book == book:
   if user_name in students_books.keys():
    if books[borrow_book] > 0:
    if borrow_book not in students_books[user_name]:
     print(r"你已經(jīng)借書<<{}>>".format(borrow_book))
     students_books[user_name].append(borrow_book)
     books[borrow_book] -= 1
     print(r"現(xiàn)在<<{}>>,剩余{}本".format(borrow_book, books[borrow_book]))
     flag = False
     break
    else:
     print("對不起,你已經(jīng)借了一本")
     flag = False
     break
    else:
    print("對不起你所借的書剩余{}本,請下次再來".format(books[borrow_book]))
    flag = False
    break
   else:
    students_books[user_name] = []
    students_books[user_name].append(borrow_book)
    books[borrow_book] -= 1
    print(r"新用戶( {} )已經(jīng)借書<< {} >>,目前此書剩余{}本".format(user_name, borrow_book, books[borrow_book]))
    flag = False
    break

  else:
   print("對不起你所查找的書,不存在,請聯(lián)系管理員更新")

 elif choices == '3':
  flag=True
  while flag:
  user_name = input("請輸入你的名字")
  repay_book = input("情輸入你所要還的書")
  for name in students_books.keys():
   #先去判斷有沒有這個人
   if name==user_name:
   #判斷有沒有這本書在不在該用戶
   if repay_book in students_books[name]:
    #判斷此本書書否在圖書館庫里面
    if repay_book in books.keys():
    books[repay_book]+=1
    students_books[name].remove(repay_book)
    print("正在還書,請稍等")
    time.sleep(1)
    print("你已經(jīng)還書了,這本書數(shù)量為{}".format(books[repay_book]))
    flag=False
    break
    else:
    print("此本書不在圖書館庫里面,請重新輸入")
    break
   else:
    print("你所輸入的書,并在你的借書目錄里面,請重新輸入")
    break
  else:
   print("對不起你所輸入的人不存在,請重新輸入")

 elif choices == '4':
  # 顯示所有書籍
  print("圖書館目前所藏書籍如下:")
  for bookkey, bookvalue in list(books.items()):
  print(r"<<{}>>目前還有 {} 本".format(bookkey, bookvalue))
  time.sleep(0.5)
 elif choices=='5':
  username=input(" 請輸入你要查詢的用戶名")
  for stu in students_books.keys():
  if username== stu:
   print("{}所借的書有{}".format(user_name,students_books[username]))
  else:
  print("你查找的用戶不在")
 elif choices == '6':
  choice = ("確定是否退出,確認(rèn)請輸入yes,否則請輸入no")
  if choice == 'yes':
  print("感謝你的使用,再見")
  break
 else:
  print('輸入錯誤請重新輸入....')