SUSE Linux Enterprise High Availability Guide: 安装、配置与管理详解

EMTP_Theory_Book_-_By_Prof._Hermann_W.Dommol.PDF

book_dict[book_id]["book_position"]=book_position

这个Python代码片段是在一个字典（`book_dict`）中操作，其中键（`book_id`）是唯一的，值是一个嵌套字典。`book_dict[book_id]`表示获取该`book_id`对应的字典条目，如果`book_id`不存在，则会创建一个新的。然后...

帮我看看这段代码为什么运行不出来import threading import time class Library(threading.Thread): def init(self): threading.Thread.init(self) self.book_num=0 def borrow(self): global book_count global lock while True: lock = threading.Lock() time.sleep(1) if book_count>0: lock.acquire() time.sleep(0.1) book_count-=1 # book_count=book_count-1 self.book_num+=1 lock.release() print(f"借走{self.book_num}本,现有图书{book_count}本") else: break def back(self): global book_count global lock while True: lock = threading.Lock() time.sleep(3) # time.sleep(0.1) lock.acquire() book_count += 1 # book_count=book_count+1 lock.release() self.book_num -= 1 print(f"归还{self.book_num}本,现有图书{book_count}本") book_count=100 result1=Library() result2=Library() result1.start() result2.start() result1.join()

print(f"借走{self.book_num}本,现有图书{book_count}本") self.lock.release() else: break def back(self): global book_count while True: time.sleep(3) self.lock.acquire() self.book_num -= 1 ...

book = Book(book_info[0], book_info[1], book_info[2], float(book_info[3]), int(book_info[4])) IndexError: list index out of range具体解决方法

book = Book(book_info[0], book_info[1], book_info[2], float(book_info[3]), int(book_info[4])) except IndexError: print("book_info 列表长度不足，无法提供正确的参数数量。") ``` 这样，当出现 `...

修改数据库Librarymanage的存储过程sp_bookquantity，使该存储过程在Bookinfo表中查询剩余数量少于2的书籍的编号（字段名为Book_ID）、书名（字段名为Book_name）、作者（字段名为Book_author）、出版社（字段名为Book_press）、价格（字段名为Book_price）和剩余数量（字段名为Book_quantity）。

SELECT Book_ID, Book_name, Book_author, Book_press, Book_price, Book_quantity FROM Bookinfo WHERE Book_quantity ; END ``` 这个存储过程会在Bookinfo表中查询剩余数量少于2的书籍的编号、书名、作者、...

为数据库Librarymanage创建一个存储过程proc_bookname，该存储过程根据使用者输入的书名（字段名为Book_name）在Bookinfo表中查询书籍的书名（字段名为Book_name）、作者（字段名为 ‏ ‌Book_author）、出版社（字段名为Book_press）和价格（字段名为Book_price）。 ‏

SELECT Book_name, Book_author, Book_press, Book_price FROM Bookinfo WHERE Book_name = @Book_name END ``` 存储过程接收一个参数`@Book_name`，表示用户输入的书名。然后在Bookinfo表中查询符合条件的书籍...

[SQL]CREATE TABLE IF NOT EXISTS table_name2 ( id INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL, user_name VARCHAR NOT NULL, book_name VARCHAR NOT NULL, book_list VARCHAR NOT NULL, book_author VARCHAR NOT NULL, book_desc VARCHAR NOT NULL, book_content VARCHAR NOT NULL ); [Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NOT NULL, book_name VARCHAR NOT NULL, book_list VARCHAR NOT NULL, ' at line 3

book_name VARCHAR(255) NOT NULL, book_list VARCHAR(255) NOT NULL, book_author VARCHAR(255) NOT NULL, book_desc VARCHAR(255) NOT NULL, book_content VARCHAR(255) NOT NULL ); ``` 这个语句将创建一个...

if len(book_info.strip().split("/")) == 5: book_author = book_info.strip().split("/")[0] # 作者 # book_translate = book_info.strip().split("/")[1] # 翻译 book_press = book_info.strip().split("/")[2].strip() # 出版社 book_time = book_info.strip().split("/")[3].strip() # 出版时间 book_price = book_info.strip().split("/")[4].replace("元","") # 出版价格 data = ",".join([book_tag, book_name, book_author, book_press, book_time, book_price,book_nums,book_pl]) writer.writerow([book_tag,book_name,book_author,book_press,book_time,book_price,book_nums,book_pl]) print("|" + " " + data + " " + "|") print("-" * 300)

接下来，它使用索引访问列表中的元素，并分别赋值给变量 `book_author`、`book_press`、`book_time` 和 `book_price`，并进行相应的处理。注意，翻译字段被注释掉了。然后，它使用 `join` 方法将这些字段用逗号...

CREATE TABLE IF NOT EXISTS "+ TABlE_NAME2 + "("+ "id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,"+ "user_name VARCHAR NOT NULL," + "book_name VARCHAR NOT NULL," + "book_list VARCHAR NOT NULL," + "book_author VARCHAR NOT NULL," + "book_desc VARCHAR NOT NULL," + "book_content VARCHAR NOT NULL,"帮我翻译成mysql建表语句

book_name VARCHAR NOT NULL, book_list VARCHAR NOT NULL, book_author VARCHAR NOT NULL, book_desc VARCHAR NOT NULL, book_content VARCHAR NOT NULL ); ``` 这个语句将创建一个名为 `table_name2` 的表，...

优化代码def array_book(): # 创建游标 mycursor = mydb.cursor() # 执行查询操作 mycursor.execute("SELECT * FROM books") # 获取所有查询结果行 books_data = mycursor.fetchall() # 将查询结果转换为数组 for book_data in books_data: book = { "id": int(book_data[0]), # 序号 "btitle": book_data[1], # 书名 "bauthor": book_data[2], # 作者 "byu_data": book_data[3], # 出版时间 "bnumber": int(book_data[4]), # 总书籍数 "ISBN": book_data[5], # 书本编号 "type": book_data[6], # 书本类型 } books.append(book) print(books) mycursor.close()使其内存使用减少

for book_data in mycursor.fetchall(): book = { "id": int(book_data[0]), # 序号 "btitle": book_data[1], # 书名 "bauthor": book_data[2], # 作者 "byu_data": book_data[3], # 出版时间 "bnumber": int...

public class BookDaoTest { @Test public void testAddBook() { //创建一个Book对象 Book book = new Book(); book.setBook_ISBN("456"); book.setBook_category("计算机科学"); book.setBook_name("java编程思想"); book.setBook_author("张三"); book.setPublish_house("机械工业出版社"); book.setPublish_time("2020-01"); book.setBook_price(65); book.setBook_sum(10); book.setBook_remain(2); book.setBook_introduce("无"); //调用addBook方法 BookDao bookDao = new BookDao(); bookDao.addBook(book); //获取添加后的图书信息 String sql = "select * from Book where book_ISBN=?"; Object[] params = { "456" }; ResultSet rs = DBHelper.executeQuery(sql, params); // 检查添加的图书信息是否正确 assertEquals("456", ((Book) rs).getBook_ISBN()); assertEquals("计算机科学", ((Book) rs).getBook_category()); assertEquals("java编程思想", ((Book) rs).getBook_name()); assertEquals("张三", ((Book) rs).getBook_author()); assertEquals("机械工业出版社", ((Book) rs).getPublish_house()); assertEquals("2020-01",((Book) rs).getPublish_time()); assertEquals(65, ((Book) rs).getBook_price(), 0.01); assertEquals(12, ((Book) rs).getBook_sum()); assertEquals(4, ((Book) rs).getBook_remain()); assertEquals("无", ((Book) rs).getBook_introduce()); } }怎么修改

addedBook.setBook_category(rs.getString("book_category")); addedBook.setBook_name(rs.getString("book_name")); addedBook.setBook_author(rs.getString("book_author")); addedBook.setPublish_house(rs....

用Java链接⃠ั 13:47:00 create database book_bar; use book_bar; create table reader( ID_card char(18), phone char(11), name varchar(6), primary key (ID_card,phone) ); create table VIP( ID_VIP char(8), categories varchar(10), discount double, amount double, primary key (ID_VIP) ); create table staff( ID_job char(8), phone char(11), name varchar(6), ID_card char(18), station varchar(6), salary double, state varchar(5), primary key (ID_job) ); create table book( book_number char(20), name varchar(20), book_kind varchar(10), book_location varchar(10), book_inventory int, book_price double, book_state varchar(5), book_purchase_time datetime, book_sale_time datetime, primary key (book_number) ); create table teaMenu( serial_number char(8), kind varchar(8), inventory int, listing_time datetime, off_shelf_time datetime, discount double, primary key (serial_number) ); ⃠ั 13:47:15 create database book_bar; use book_bar; create table reader( ID_card char(18), phone char(11), name varchar(6), primary key (ID_card,phone) ); create table VIP( ID_VIP char(8), categories varchar(10), discount double, amount double, primary key (ID_VIP) ); create table staff( ID_job char(8), phone char(11), name varchar(6), ID_card char(18), station varchar(6), salary double, state varchar(5), primary key (ID_job) ); create table book( book_number char(20), name varchar(20), book_kind varchar(10), book_location varchar(10), book_inventory int, book_price double, book_state varchar(5), book_purchase_time datetime, book_sale_time datetime, primary key (book_number) ); create table teaMenu( serial_number char(8), kind varchar(8), inventory int, listing_time datetime, off_shelf_time datetime, discount double, primary key (serial_number) );

sql = "create table book( book_number char(20), name varchar(20), book_kind varchar(10), book_location varchar(10), book_inventory int, book_price double, book_state varchar(5), book_purchase_time ...

create or replace function InsertSale() returns trigger as $$ begin insert into Bookstock values(new.Sale_ID,new.Sale_Date,'出库',new.Sale_Number,new.Book_ISBN); update Book set Book_Stock = Book_Stock - new.Sale_Number where Book_ISBN = new.Book_ISBN; return new; end; $$ language plpgsql;这段代码中的Book表无法更新

UPDATE Book SET Book_Stock = Book_Stock - NEW.Sale_Number WHERE Book_ISBN = NEW.Book_ISBN; RETURN NEW; END; $$ LANGUAGE plpgsql; CREATE TRIGGER sale_insert AFTER INSERT ON Sale FOR EACH ROW EXECUTE...

create trigger tri_jieshu on reader_borrow for insert as declare @id varchar(50) select @id=borrow_id from inserted update book_borrowing set book_surplus=book_surplus-1 where book_id=@id create trigger tri_huanshu on reader_back for insert as declare @id varchar(50) select @id=back_id from inserted update book_borrowing set book_surplus=book_surplus+1 where book_id=@id create proc payment @id varchar(20),@name varchar(20) as begin select borrow_date,back_date from reader_back,reader_borrow where back_id=borrow_id and back_id=@id and borrow_bookname=back_bookname and (select datediff(day, borrow_date,back_date) FROM reader_back,reader_borrow)>7 end create view view_pay as select * from reader_back,reader_borrow where (borrow_id=back_id and borrow_bookname=back_bookname) create proc proc_pay (@id varchar(20)) as select back_id,back_bookname,back_date,borrow_date from view_pay where back_id=@id exec proc_pay @id='1'该代码有什么语法错误

update book_borrowing set book_surplus=book_surplus-1 where book_id=(select book_id from inserted) ``` 和 ``` update book_borrowing set book_surplus=book_surplus+1 where book_id=(select book_id from ...

book表的属性如下： book_id, int book_name, varchar(100) authors varchar(100) info varchar(100) comments varchar(100) year_publication datetime 根据如下要求编写SQL代码： 1、创建 book 表，同时为 book_name, info 属性显示创建联合索引mul_bname_info，验证索引是否创建成功 2、修改 book 表，并为 comments 属性创建普通索引idx_cmt，为 book_name 属性创建唯一索引uk_idx_bname 3、删除 book 表的联合索引mul_bname_info

1、创建 book 表并为 book_name, info 属性创建联合索引mul_bname_info，并验证索引是否创建成功： ``` CREATE TABLE book ( book_id int, book_name varchar(100), authors varchar(100), info varchar(100), ...

import requests import os from bs4 import BeautifulSoup class book_spider(): def init(self,root_url): self.root_url=root_url self.book_list=[] #一级页面中获取的数据（二级页面地址）存放于此列表 self.chapter_list=[] #二级页面中获取的数据（三级页面地址和章节名）存放于此列表 def get_url(url): while True: try: res=requests.get(url) if res.status_code==200: res.encoding =res.apparent_encoding print("页面获取成功") return res.text else: print("页面返回异常",res.status_code) except: print("页面获取错误") def get_book_list(self.url): res = self.get_url(url) html = BeautifulSoup(res,"html.parser") a_list = html.find_all("a",{"class":"name"}) for a in a_list: self.book_list.append(a["href"]) self.book_list = [self.root_url+i for i in self.bbok_list] self.book_list.remove('http://10.1.88.252:7000/庆余年') print(book_list) def get_chapter_list(self,url): res = self.get_url(url) html = BeautifulSoup(res,"html.parser") a_list = html.find_all("a",{"class":"chapter"}) for a in a_list: self.chapter_list.append((a["href"],a.text.replace("\n",""))) def get_content(self.chapter): url = self.root_url + chapter[0] print(url) book_name = chapter[0].split("/")[1] print(book_name) if not os.path.exists(book_name): os.mkdir(book_name) res = self.get_url(url) html = BeautifulSoup(res,"html.parser") content = html.find("div",{"id":"content"}).text print(content) path = os.path.join(book_name,chapter[1]) with open(path,"w",encoding="utf8") as f: f.write(content) def main(): self.get_book_list(self.root_url) for book in self.book_list: self.get_chapter_liat(book) for chapter in chapter_list: self.get_content(chapter) book_s = book_spider("http://10.1.88.252:7000") book_s.main()这是一段爬虫代码，找出里面的错误并改正

2. 在 `get_book_list` 方法中，`print(book_list)` 应该改为 `print(self.book_list)`，因为 `book_list` 是类成员变量。 3. 在 `get_book_list` 方法中，将 `self.bbok_list` 改为 `self.book_list`。 4. 在 `...

[SQL]CREATE TABLE "up_book" ( `id` INTEGER NOT NULL, `user_name` VARCHAR NOT NULL, `book_name` VARCHAR NOT NULL, `book_list` VARCHAR NOT NULL, `book_author` VARCHAR NOT NULL, `book_desc` VARCHAR NOT NULL, `book_content` VARCHAR NOT NULL, PRIMARY KEY("id") ); [Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '"up_book" ( `id` INTEGER NOT NULL, `user_name` VARCHAR NOT NULL, `book_nam' at line 1帮我修改错误

`book_name` VARCHAR(255) NOT NULL, `book_list` VARCHAR(255) NOT NULL, `book_author` VARCHAR(255) NOT NULL, `book_desc` VARCHAR(255) NOT NULL, `book_content` VARCHAR(255) NOT NULL, PRIMARY KEY(`...

SUSE Linux Enterprise High Availability Guide: 安装、配置与管理详解

EMTP_Theory_Book_-_By_Prof._Hermann_W.Dommol.PDF

book_dict[book_id]["book_position"]=book_position

book = Book(book_info[0], book_info[1], book_info[2], float(book_info[3]), int(book_info[4])) IndexError: list index out of range具体解决方法

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