php复制代码public static function crawlContent($url, $encode = true)
{
    $file_name = '../cache/' . md5($url);
    if (!file_exists($file_name)) {
        @touch($file_name);
    }
    $content = file_get_contents($file_name);
    if (empty($content)) {
        $content = Request::curl($url);
        if (empty($content)) {
            sleep(rand(3,10));
            $content = Request::curl($url);
        }
        $encode && $content = iconv("GBK", "UTF-8//IGNORE", $content);
        file_put_contents($file_name, $content);
    }
    return $content;
}

php复制代码public static function curl($url , $configs = array())
{
    $b = microtime(true);
    $new_ch = curl_init();
    self::_setopt($new_ch , $url , $configs);
    $result = curl_exec($new_ch);
    $e = microtime(true);
    if (curl_errno($new_ch))
    {
        Logger::log('CULR_BAD\t' . "curl_errno:" . curl_errno($new_ch) . "\t" . curl_error($new_ch) . "\t" . ($e - $b) . "\t" . $url);
    }
    curl_close($new_ch);
    return $result;
}

php复制代码
<?php
// 查找id='#container'的元素
$ret = $html->find('#container');

// 找到所有class=foo的元素
$ret = $html->find('.foo');

// 查找多个html标签
$ret = $html->find('a, img');

// 还可以这样用
$ret = $html->find('a[title], img[title]');
?>

php复制代码<?php
include '../include/Config.php';
include '../include/Db.php';
include '../include/Logger.php';
include '../include/Request.php';
include '../include/simple_html_dom.php';
include '../include/Utils.php';
//综合脚本 一套代码完成 抓取商品详情链接 抓取商品图 下载商品图
$db_aliexpress = new Db($db_xxxx);

parseContent($db_xxxx);

function parseContent($spider)
{
    for($p=9;$p<50;$p++){
        $url = 'https://www.xxxxx.com/store/5435064/search/'.$p.'.html?SortType=bestmatch_sort';
        var_dump($url);
        $m_content = Utils::curlProxy($url, false);
        $detail_html = str_get_html($m_content);
        if ($detail_html) {  
            $content = $detail_html->find('.m-o-large-all-detail .ui-box .ui-box-body ul li');
            if ($content) {
                $counts = count($content);
                for ($i = 0; $i < $counts; $i++) {
                    $name = trim($detail_html->find('.m-o-large-all-detail .ui-box .ui-box-body ul li .detail h3 a', $i)->plaintext); //名称
                    $href = 'https:'.trim($detail_html->find('.m-o-large-all-detail .ui-box .ui-box-body ul li .detail h3 a', $i)->href); //url
                    preg_match_all('/[1-9]\d*/', $href, $matches);
                    $source_id = $matches[0][0];
                    $price = trim($detail_html->find('.m-o-large-all-detail .ui-box .ui-box-body ul li .cost b', $i)->plaintext); //价格
                    $data = array(
                        'name' => $name,
                        'source_url' => $href,
                        'source_id' => $source_id,
                        'price'=>$price,
                        'created_at'=>date('Y-m-d H:i:s'),
                        'date'=>date('m-d'),
                    );
                    $id = $spider->insert('products', $data);
                    var_dump("商品信息：products_" . $id);
                    if ($id){
                        //存储图片
                        catchThumbs($id,$href,$spider);
                    }
                }
            }
        }
    }
}

//抓取商品图
function catchThumbs($id,$detail_url,$spider)
{
    $m_content = Utils::curlProxy($detail_url, false);

    $before = strpos($m_content, 'imagePathList');
    $after = strpos($m_content,'ImageModule',1);
    $count = $after-$before-24;

    $thumbs = substr($m_content,$before+15,$count);

    $data = array(
        'thumbs'=>$thumbs,
        'updated_at'=>date('Y-m-d H:i:s'),
    );
    $res = $spider->update('products', $data, 'id = '.$id);
    var_dump('抓取商品图：'.$res." id=".$id);
    if ($res){
        //更新成功则下载图片
        downloadThumbs($id,$thumbs,$spider);
    }
}

//下载商品图
function downloadThumbs($id,$thumbs,$spider)
{
        $Ymd = date('md');
        $thumbs = json_decode($thumbs,true);
        foreach ($thumbs as $key=> $thumb){
            $image_name = $Ymd.'-'.$id.'-'.($key+1).'.jpg';
            $image_name = './pics/'.$image_name;
            saveImage($thumb,$image_name);
        }
}

/**
 * 从网上下载图片保存到服务器
 * @param $path 图片网址
 * @param $image_name 保存到服务器的路径 './public/upload/users_avatar/'.time()
 */
function saveImage($path, $image_name) {
    $ch = curl_init ($path);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
    $img = curl_exec ($ch);
    curl_close ($ch);
//$image_name就是要保存到什么路径,默认只写文件名的话保存到根目录
    $fp = fopen($image_name,'w');//保存的文件名称用的是链接里面的名称
    fwrite($fp, $img);
    fclose($fp);
}

python复制代码
xuewei_account = dict()
xuewei_account['amount'] = 100

# amount为负数即是转出金额
def transfer(money):
    for i in range(100000):
        xuewei_account['amount'] = xuewei_account['amount'] + money

python复制代码#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/11/26 12:02 上午
# @Author : LeiXueWei
# @CSDN/Juejin/Wechat: 雷学委
# @XueWeiTag: CodingDemo
# @File : threadsafe_queue1.py
# @Project : hello
import random
import threading
import datetime
import time

xuewei_account = dict()
xuewei_account['amount'] = 100


# amount为负数即是转出金额
def transfer(money):
    for i in range(100000):
        xuewei_account['amount'] = xuewei_account['amount'] + money


# 创建20个任务重复给学委账户转账
threads = []
for i in range(10):
    t1 = threading.Thread(target=lambda: transfer(-1))
    threads.append(t1)
    t2 = threading.Thread(target=lambda: transfer(1))
    threads.append(t2)

for t in threads:
    t.start()
for t in threads:
    t.join()

print("-" * 16)
print("活跃线程数:", threading.active_count())
print("活跃线程:", threading.current_thread().name)
print("学委账户余额：", xuewei_account)

python复制代码event(amount=1,acount=xuewei_account)
....
event(amount=-1,acount=xuewei_account)
....
event(amount=1,acount=xuewei_account)
....
event(amount=-1,acount=xuewei_account)

python复制代码#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/11/26 12:02 上午
# @Author : LeiXueWei
# @CSDN/Juejin/Wechat: 雷学委
# @XueWeiTag: CodingDemo
# @File : threadsafe_queue2.py
# @Project : hello
import random
import threading
import datetime
import time
import queue

q = queue.Queue()

xuewei_account = dict()
xuewei_account['amount'] = 100


# amount为负数即是转出金额
def transfer(money):
    for i in range(100000):
        q.put(money)


def handle_amount():
    while not q.empty():
        amount = q.get()
        xuewei_account['amount'] += amount


def monitor_q():
    counter = 0
    time.sleep(3)
    while counter < 1000 and not q.empty():
        print("q size:", q.qsize())
        time.sleep(3)
        counter+=1


q_thread = threading.Thread(name="Q监控", target=monitor_q)
q_thread.start()
# 创建20个任务重复给学委账户转账
threads = []
for i in range(10):
    t1 = threading.Thread(target=lambda: transfer(-1))
    threads.append(t1)
    t2 = threading.Thread(target=lambda: transfer(1))
    threads.append(t2)

for t in threads:
    t.start()

vip_thread = threading.Thread(name="处理转账专线", target=handle_amount)
vip_thread.start()



for t in threads:
    t.join()
vip_thread.join()

print("-" * 16)
print("活跃线程数:", threading.active_count())
print("活跃线程:", threading.current_thread().name)
print("学委账户余额：", xuewei_account)

xml复制代码<!-- redis依赖信息 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

xml复制代码<!--导入jedis-->        
<dependency>            
    <groupId>redis.clients</groupId>            
    <artifactId>jedis</artifactId>        
</dependency>

properties复制代码# Redis配置项，以spring.redis为前缀
# 数据库索引（默认为0）
spring.redis.database=0
# 服务器地址
spring.redis.host=127.0.0.1
# 端口
spring.redis.port=6379
# 密码（默认为空，为空时不设置该属性）
spring.redis.password=redis
# 超时时间（毫秒）
spring.redis.timeout=30000
​
# 建议使用lettuce 可以换成jedis，spring默认集成lettuce
spring.redis.client-type=lettuce
​
# 如果使用jedis客户端，则下面定义的内容需要将lettuce换成jedis
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.lettuce.pool.max-active=10
# 最大阻塞等待时间（使用负值表示没有限制）
spring.redis.lettuce.pool.max-wait=-2
# 最大空闲连接数
spring.redis.lettuce.pool.max-idle=10
# 最小空闲连接
spring.redis.lettuce.pool.min-idle=0

java复制代码@Configuration(
    proxyBeanMethods = false
)
@ConditionalOnClass({RedisOperations.class})
@EnableConfigurationProperties({RedisProperties.class})
@Import({LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class})
public class RedisAutoConfiguration {
    public RedisAutoConfiguration() {
    }
​
    @Bean
    @ConditionalOnMissingBean(
        name = {"redisTemplate"}
    )
    @ConditionalOnSingleCandidate(RedisConnectionFactory.class)
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }
​
    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnSingleCandidate(RedisConnectionFactory.class)
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
        return new StringRedisTemplate(redisConnectionFactory);
    }
}

java复制代码//自定义RedisConfig
@Configuration
public class RedisConfig {
​
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(factory);
        //采用String的序列化方式
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        // value序列化方式采用jackson
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
        
        return redisTemplate;
    }
}

java复制代码@Autowired
private RedisTemplate redisTemplate;
​
@Test
public void testRedis(){
    ValueOperations<String, String> operations = redisTemplate.opsForValue();
    operations.set("name", "tom");
    System.out.println(operations.get("name"));
}

java复制代码package com.heiz.design.mediator;

/**
 * @author 小黑说Java
 * @ClassName Human
 * @Description 代表人类
 * @date 2021/11/27
 **/
public abstract class Human {
    public abstract void xuqiu();
}

java复制代码package com.heiz.design.mediator;

/**
 * @author 小黑说Java
 * @ClassName SocialLivestock
 * @Description 租客 （不要翻译了，类名是“社畜”）
 * @date 2021/11/27
 **/
public class SocialLivestock extends Human {
    @Override
    public void xuqiu() {
        System.out.println("租客：我要租一间小房子");
    }
}

java复制代码package com.heiz.design.mediator;

/**
 * @author 小黑说Java
 * @ClassName Landlord
 * @Description 房东
 * @date 2021/11/27
 **/
public class Landlord extends Human {
    @Override
    public void xuqiu() {
        System.out.println("我有一间房屋需要出租");
    }
}

java复制代码package com.heiz.design.mediator;

/**
 * @author yuriy.lu
 * @ClassName RoomMediator
 * @Description 中介
 * @date 2021/11/27
 **/
public class RoomMediator {

    public void zulin(Human human) {
        human.xuqiu();
        System.out.println("中介帮您解决~");
    }
}

java复制代码package com.heiz.design.mediator;

/**
 * @author 小黑说Java
 * @ClassName RoomMediatorTest
 * @Description
 * @date 2021/11/27
 **/
public class RoomMediatorTest {

    public static void main(String[] args) {
        Human landlord = new Landlord();
        Human socialLivestock = new SocialLivestock();

        RoomMediator roomMediator = new RoomMediator();
        roomMediator.zulin(landlord);
        roomMediator.zulin(socialLivestock);
    }

}

arduino复制代码public interface StateHandler {

    DeviceStatusEnum state();

    void handle(String deviceNo, String code);
}

typescript复制代码@Component
public class StateContext {

    public Map<DeviceStatusEnum, StateHandler> stateMap = new HashMap<>();

    public StateContext(List<StateHandler> stateHandlerList){
        stateHandlerList.forEach(handler -> {
            stateMap.put(handler.state(), handler);
        });
    }

    public StateHandler getHandler(DeviceStatusEnum state){
        return stateMap.get(state);
    }
}

typescript复制代码@Component
public class OutStateHandler implements StateHandler{
    @Override
    public DeviceStatusEnum state() {
        return DeviceStatusEnum.OUT;
    }

    @Override
    public void handle(String deviceNo, String code) {
        // TODO
    }
}

ini复制代码DeviceStatusEnum state = DeviceStatusEnum.get(status.getStatus());
StateHandler handler = stateContext.getHandler(state);
handler.handle(request.getSN(), request.getBerthCode());

csharp复制代码public interface IExtensionHandler<Y extends Enum>{
    Y extension();
}

java复制代码public interface IExtensionHandlerFactory {
    /**
     * 添加扩展处理器
     * @param extensionHandler 处理器
     * @param <Y> 扩展点
     */
    <Y extends Enum<Y>>void addExtensionHandler(IExtensionHandler<Y> extensionHandler);

    /**
     * 获取扩展点处理器
     * @param extension 扩展点
     * @param type 处理器类型
     * @param <T> 扩展处理器
     * @param <Y> 扩展点
     */
    <T extends IExtensionHandler<Y>,Y extends Enum<Y>> T getExtensionHandler(Y extension, Class<T> type);
}

typescript复制代码@Slf4j
public class DefaultExtensionHandlerFactoryImpl implements IExtensionHandlerFactory, ApplicationContextAware {

    private final Map<Enum, List<IExtensionHandler>> serviceListCache = new ConcurrentHashMap<>();
    private final Map<ExtensionCacheKey, IExtensionHandler> serviceCache = new ConcurrentHashMap<>();

    @Override
    public <Y extends Enum<Y>> void addExtensionHandler(IExtensionHandler<Y> extensionHandler) {
        Assert.notNull(extensionHandler.extension(), "add extension handler failed, bean class " + extensionHandler.getClass().getName() + " extension is null");
        serviceListCache.putIfAbsent(extensionHandler.extension(), new LinkedList<>());
        serviceListCache.get(extensionHandler.extension()).add(extensionHandler);
    }

    @Override
    public <T extends IExtensionHandler<Y>, Y extends Enum<Y>> T getExtensionHandler(Y extension, Class<T> type) {
        ExtensionCacheKey<Y> cacheKey = new ExtensionCacheKey(extension, type);
        IExtensionHandler result = this.serviceCache.get(cacheKey);
        if (result == null) {
            List<IExtensionHandler> extensionHandlers = serviceListCache.getOrDefault(extension, Collections.synchronizedList(Collections.emptyList()));
            for (IExtensionHandler extensionHandler : extensionHandlers) {
                if (type.isAssignableFrom(extensionHandler.getClass())) {
                    result = extensionHandler;
                    serviceCache.put(cacheKey, result);
                    break;
                }
            }
            if (result == null) {
                log.warn("No IExtensionHandler found by CacheKey : " + cacheKey + " !");
            }
        }
        return (T) result;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        Map<String,IExtensionHandler> handlerMap = applicationContext.getBeansOfType(IExtensionHandler.class);
        log.info("疯狂加载扩展ing ...");
        long start = System.currentTimeMillis();
        handlerMap.forEach((k, v) -> {
            //排除组合类自己
            if (!this.getClass().isAssignableFrom(v.getClass())) {
                addExtensionHandler(v);
            }
        });
        long end = System.currentTimeMillis();
        log.info("加载扩展点结束，耗时: {}, 扩展点个数: {}", end - start, handlerMap.size());
    }
}

less复制代码@Data
@AllArgsConstructor
@ToString
@EqualsAndHashCode
public class ExtensionCacheKey<T extends Enum> {

    private T extension;
    private Class<? extends IExtensionHandler<T>> extensionHandlerClass;
}

python复制代码
# 导入需要的包和模块
import sys
from PyQt5.QtWidgets import QWidget
from PyQt5.QtWidgets import QDesktopWidget
# QDesktopWidget这个库提供了用户的桌面信息,包括屏幕的大小
from PyQt5.QtWidgets import QApplication

# 创建一个类
class Ex(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.resize(250,150)
        self.center()
        # 这个方法调用我们下面写的,实现对话框居中的方法
        self.setWindowTitle('chuangkou要居中')
        self.show()

    def center(self):
        qr = self.frameGeometry()
        # 得到了主窗口大小
        print('qr:',qr)
        cp = QDesktopWidget().availableGeometry().center()
        # 获取显示器的分辨率,然后得到中间点的位置
        print('cp:',cp)
        qr.moveCenter(cp)
        # 然后把自己的窗口的中心点放到qr的中心点
        self.move(qr.topLeft())

app = QApplication(sys.argv)
demo1 = Ex()
sys.exit(app.exec_())

python复制代码
# 导入需要的包和模块
import sys
# from PyQt5.QtWidgets import QWidget
# from PyQt5.QtWidgets import QDesktopWidget
# QDesktopWidget这个库提供了用户的桌面信息,包括屏幕的大小
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QMainWindow


class Ex(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 状态栏是由这个创建的
        self.statusBar().showMessage('准备')
        # 调用QtGui.QMainWindow 类的 statusBar()方法
        #3 创建状态栏.第一次调用创建一个状态栏,返回一个状态栏对象.
        #3 showMessage()方法在状态栏上显示一条信息
        self.setGeometry(300,300,250,150)
        self.setWindowTitle('标题还是要取的')
        #显示
        self.show()

app = QApplication(sys.argv)
demo1 = Ex()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtWidgets import QMainWindow
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QAction
from PyQt5.QtWidgets import qApp
from PyQt5.QtGui import QIcon

class Ex(QMainWindow):

    def __init__(self):
        super(Ex, self).__init__()
        self.initUI()

    def initUI(self):
        exitAct = QAction(QIcon("exit.png"),'&Exit',self)
        print(exitAct)
        exitAct.setShortcut("ctrl+q")
        exitAct.setStatusTip('tuichu应用')
        exitAct.triggered.connect(qApp.quit)

        self.statusBar()

        menubar = self.menuBar()
        fileMenu = menubar.addMenu('&File')
        fileMenu.addAction(exitAct)

        self.setGeometry(300,300,399,200)
        self.setWindowTitle('决赛你电脑的')
        self.show()

app = QApplication(sys.argv)
demo1 = Ex()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtWidgets import QMainWindow, QAction, QMenu, QApplication

class Example(QMainWindow):

    def __init__(self):
        super().__init__()
        self.initUI()


    def initUI(self):

        menubar = self.menuBar()
        fileMenu = menubar.addMenu('File')
        impMenu = QMenu('Import', self)
        impAct = QAction('Import mail', self)
        impMenu.addAction(impAct)

        newAct = QAction('New', self)

        fileMenu.addAction(newAct)
        fileMenu.addMenu(impMenu)

        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Submenu')
        self.show()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtWidgets import QMainWindow, QAction, QApplication

class Example(QMainWindow):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        self.statusbar = self.statusBar()
        self.statusbar.showMessage('Ready')

        menubar = self.menuBar()
        viewMenu = menubar.addMenu('View')

        # 本例创建了一个行为菜单。这个行为／动作能切换状态栏显示或者隐藏。
        viewStatAct = QAction('View statusbar', self, checkable=True)
        viewStatAct.setStatusTip('View statusbar')        # 用checkable选项创建一个能选中的菜单。
        viewStatAct.setChecked(True)        # 默认设置为选中状态
        viewStatAct.triggered.connect(self.toggleMenu)

        viewMenu.addAction(viewStatAct)
        # 依据选中状态切换状态栏的显示与否。
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Check menu')
        self.show()

    def toggleMenu(self, state):

        if state:
            self.statusbar.show()
        else:
            self.statusbar.hide()

app = QApplication(sys.argv)
demo1 = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtWidgets import QMainWindow, qApp, QMenu, QApplication


class Example(QMainWindow):

    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Context menu')
        self.show()

    def contextMenuEvent(self, event):
        cmenu = QMenu(self)

        newAct = cmenu.addAction("New")
        print(newAct)
        opnAct = cmenu.addAction("Open")
        print(opnAct)
        quitAct = cmenu.addAction("Quit")
        action = cmenu.exec_(self.mapToGlobal(event.pos()))

        if action == quitAct:
            qApp.quit()
        elif action == opnAct:
            print('打开就打开')
        elif action == newAct:
            print('新建就新建')


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
# 菜单栏包含了所有的命令，工具栏就是常用的命令的集合。

import sys
from PyQt5.QtWidgets import QMainWindow, QAction, qApp, QApplication
from PyQt5.QtGui import QIcon

class Example(QMainWindow):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        exitAct = QAction(QIcon('logo.png'), 'Exit', self)
        exitAct.setShortcut('Ctrl+Q')
        exitAct.triggered.connect(qApp.quit)
        # 和上面的菜单栏差不多，这里使用了一个行为对象，
        # 这个对象绑定了一个标签，一个图标和一个快捷键。
        # 这些行为被触发的时候，会调用QtGui.QMainWindow的quit方法退出应用。
        self.toolbar = self.addToolBar('Exit')
        self.toolbar.addAction(exitAct)

        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Toolbar')
        self.show()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
# 上面的例子中，我们创建了一个工具栏这个工具栏只有一个退出应用的动作

python复制代码
# 本模块的功能:<>
import sys
from PyQt5.QtWidgets import QMainWindow
from PyQt5.QtWidgets import QTextEdit
from PyQt5.QtWidgets import QAction
from PyQt5.QtWidgets import QApplication
from PyQt5.QtGui import QIcon


class Example(QMainWindow):

    def __init__(self):
        super().__init__()
        self.initUI()


    def initUI(self):

        textEdit = QTextEdit()
        self.setCentralWidget(textEdit)

        exitAct = QAction(QIcon('logo.png'), '退退退', self)
        exitAct.setShortcut('Ctrl+Q')
        exitAct.setStatusTip('退出应用')
        exitAct.triggered.connect(self.close)

        self.statusBar()

        menubar = self.menuBar()
        fileMenu = menubar.addMenu('文件')
        fileMenu.addAction(exitAct)

        toolbar = self.addToolBar('退出')
        toolbar.addAction(exitAct)

        self.setGeometry(300, 300, 350, 250)
        self.setWindowTitle('代码编辑工具')
        self.show()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtWidgets import QWidget, QLabel, QApplication

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        lbl1 = QLabel('Zetcode', self)
        lbl1.move(15, 10)

        lbl2 = QLabel('tutorials', self)
        lbl2.move(35, 40)

        lbl3 = QLabel('for programmers', self)
        lbl3.move(55, 70)

        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Absolute')
        self.show()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

# 绝对定位其实说白了就是使用相对于原点的像素来进行计算

python复制代码
import sys
from PyQt5.QtWidgets import (QWidget, QPushButton,
    QHBoxLayout, QVBoxLayout, QApplication)


class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        okButton = QPushButton("OK")
        cancelButton = QPushButton("Cancel")

        hbox = QHBoxLayout()
        hbox.addStretch(1)
        hbox.addWidget(okButton)
        hbox.addWidget(cancelButton)

        vbox = QVBoxLayout()
        vbox.addStretch(1)
        vbox.addLayout(hbox)

        self.setLayout(vbox)

        self.setGeometry(300, 300, 300, 150)
        self.setWindowTitle('Buttons')
        self.show()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtWidgets import (QWidget, QGridLayout,
    QPushButton, QApplication)


class Example(QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()


    def initUI(self):

        grid = QGridLayout()
        self.setLayout(grid)

        names = ['Cls', 'Bck', '', 'Close',
                 '7', '8', '9', '/',
                '4', '5', '6', '*',
                 '1', '2', '3', '-',
                '0', '.', '=', '+']

        positions = [(i,j) for i in range(5) for j in range(4)]

        for position, name in zip(positions, names):

            if name == '':
                continue
            button = QPushButton(name)
            grid.addWidget(button, *position)

        self.move(300, 150)
        self.setWindowTitle('Calculator')
        self.show()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtWidgets import \
    (QWidget, QLabel, QLineEdit, QTextEdit, QGridLayout, QApplication)


class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):
        title = QLabel('Title')
        author = QLabel('Author')
        review = QLabel('Review')

        titleEdit = QLineEdit()
        authorEdit = QLineEdit()
        reviewEdit = QTextEdit()

        grid = QGridLayout()
        grid.setSpacing(10)

        grid.addWidget(title, 1, 0)
        grid.addWidget(titleEdit, 1, 1)

        grid.addWidget(author, 2, 0)
        grid.addWidget(authorEdit, 2, 1)

        grid.addWidget(review, 3, 0)
        grid.addWidget(reviewEdit, 3, 1, 5, 1)

        self.setLayout(grid)

        self.setGeometry(300, 300, 350, 300)
        self.setWindowTitle('Review')
        self.show()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
'''
事件
signals and slots 被其他人翻译成信号和槽机制，(⊙o⊙)…我这里还是不翻译好了。
所有的应用都是事件驱动的。事件大部分都是由用户的行为产生的，当然也有其他的事件产生方式，
比如网络的连接，窗口管理器或者定时器等。调用应用的exec_()方法时，应用会进入主循环，主循环会监听和分发事件。
在事件模型中，有三个角色：
事件源
事件
事件目标
事件源就是发生了状态改变的对象。事件是这个对象状态改变的内容。
事件目标是事件想作用的目标。事件源绑定事件处理函数，然后作用于事件目标身上。
PyQt5处理事件方面有个signal and slot机制。Signals and slots用于对象间的通讯。
事件触发的时候，发生一个signal，slot是用来被Python调用的
（相当于一个句柄？这个词也好恶心，就是相当于事件的绑定函数）slot只有在事件触发的时候才能调用。
'''

import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import \
    (QWidget, QLCDNumber, QSlider, QVBoxLayout, QApplication)


class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        lcd = QLCDNumber(self)
        print("lcd:",lcd)
        sld = QSlider(Qt.Horizontal, self)
        print("sld",sld)
        vbox = QVBoxLayout()
        print(vbox)
        vbox.addWidget(lcd)
        vbox.addWidget(sld)

        self.setLayout(vbox)
        print(lcd.display)
        sld.valueChanged.connect(lcd.display)

        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('信号和槽机制的')
        self.show()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QWidget, QApplication

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('事件的手')
        self.show()


    def keyPressEvent(self, e):

        if e.key() == Qt.Key_Escape:
            self.close()


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QWidget, QApplication, QGridLayout, QLabel

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        grid = QGridLayout()
        grid.setSpacing(10)

        x = 0
        y = 0

        self.text = "x: {0},  y: {1}".format(x, y)

        self.label = QLabel(self.text, self)
        grid.addWidget(self.label, 0, 0, Qt.AlignTop)

        self.setMouseTracking(True)

        self.setLayout(grid)

        self.setGeometry(300, 300, 350, 200)
        self.setWindowTitle('Event object')
        self.show()


    def mouseMoveEvent(self, e):

        x = e.x()
        y = e.y()

        text = "x: {0},  y: {1}".format(x, y)
        self.label.setText(text)


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtWidgets import QMainWindow, QPushButton, QApplication


class Example(QMainWindow):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        btn1 = QPushButton("按钮老大", self)
        btn1.move(30, 50)

        btn2 = QPushButton("按钮老二", self)
        btn2.move(150, 50)

        btn1.clicked.connect(self.buttonClicked)
        btn2.clicked.connect(self.buttonClicked)

        self.statusBar()

        self.setGeometry(300, 300, 290, 150)
        self.setWindowTitle('事件发送')
        self.show()


    def buttonClicked(self):

        sender = self.sender()
        self.statusBar().showMessage(sender.text() + '被按那儿了')


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
import sys
from PyQt5.QtCore import pyqtSignal, QObject
from PyQt5.QtWidgets import QMainWindow, QApplication


class Communicate(QObject):

    closeApp = pyqtSignal()


class Example(QMainWindow):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        self.c = Communicate()
        self.c.closeApp.connect(self.close)

        self.setGeometry(300, 300, 290, 150)
        self.setWindowTitle('Emit signal')
        self.show()


    def mousePressEvent(self, event):

        self.c.closeApp.emit()


if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

python复制代码
from PyQt5.QtWidgets import (QWidget, QPushButton, QLineEdit,
    QInputDialog, QApplication)
import sys

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        self.btn = QPushButton('Dialog', self)
        self.btn.move(20, 20)
        self.btn.clicked.connect(self.showDialog)

        self.le = QLineEdit(self)
        self.le.move(130, 22)

        self.setGeometry(300, 300, 290, 150)
        self.setWindowTitle('Input dialog')
        self.show()


    def showDialog(self):

        text, ok = QInputDialog.getText(self, 'Input Dialog',
            'Enter your name:')

        if ok:
            self.le.setText(str(text))

        print(text+"哈哈")


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
# 本模块的功能:<QColorDialog提供颜色的选择>
# TODO 这个厉害,直接调用系统的颜色选择框
# TODO 强,实在是强
from PyQt5.QtWidgets import (QWidget, QPushButton, QFrame,
    QColorDialog, QApplication)
from PyQt5.QtGui import QColor
import sys

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        col = QColor(0, 0, 0)

        self.btn = QPushButton('Dialog', self)
        self.btn.move(20, 20)

        self.btn.clicked.connect(self.showDialog)

        self.frm = QFrame(self)
        self.frm.setStyleSheet("QWidget { background-color: %s }"
            % col.name())
        self.frm.setGeometry(130, 22, 100, 100)

        self.setGeometry(300, 300, 250, 180)
        self.setWindowTitle('Color dialog')
        self.show()


    def showDialog(self):

        col = QColorDialog.getColor()

        if col.isValid():
            self.frm.setStyleSheet("QWidget { background-color: %s }"
                % col.name())


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
'''

       ┌─┐       ┌─┐ + +
    ┌──┘ ┴───────┘ ┴──┐++
    │                 │
    │       ───       │++ + + +
    ███████───███████ │+
    │                 │+
    │       ─┴─       │
    │                 │
    └───┐         ┌───┘
        │         │
        │         │   + +
        │         │
        │         └──────────────┐
        │                        │
        │                        ├─┐
        │                        ┌─┘
        │                        │
        └─┐  ┐  ┌───────┬──┐  ┌──┘  + + + +
          │ ─┤ ─┤       │ ─┤ ─┤
          └──┴──┘       └──┴──┘  + + + +
                 神兽保佑
                代码无BUG!


'''

python复制代码
from PyQt5.QtWidgets import (QWidget, QVBoxLayout, QPushButton,
    QSizePolicy, QLabel, QFontDialog, QApplication)
import sys

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        vbox = QVBoxLayout()

        btn = QPushButton('来来来', self)
        btn.setSizePolicy(QSizePolicy.Fixed,
            QSizePolicy.Fixed)

        btn.move(20, 20)

        vbox.addWidget(btn)

        btn.clicked.connect(self.showDialog)

        self.lbl = QLabel('Knowledge only matters', self)
        self.lbl.move(130, 20)

        vbox.addWidget(self.lbl)
        self.setLayout(vbox)

        self.setGeometry(300, 300, 250, 180)
        self.setWindowTitle('字体目录')
        self.show()


    def showDialog(self):

        font, ok = QFontDialog.getFont()
        if ok:
            self.lbl.setFont(font)
        print('选择的字体是',end="")
        print(font)
        print(type(font))


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
from PyQt5.QtWidgets import \
    (QMainWindow, QTextEdit, QAction, QFileDialog, QApplication)
from PyQt5.QtGui import QIcon
import sys

class Example(QMainWindow):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        self.textEdit = QTextEdit()
        self.setCentralWidget(self.textEdit)
        self.statusBar()

        openFile = QAction(QIcon('images/open.png'), 'Open', self)
        openFile.setShortcut('Ctrl+O')
        openFile.setStatusTip('打开一个新的文件')
        openFile.triggered.connect(self.showDialog)

        menubar = self.menuBar()
        fileMenu = menubar.addMenu('&文件')
        fileMenu.addAction(openFile)

        self.setGeometry(300, 300, 350, 300)
        self.setWindowTitle('File dialog')
        self.show()


    def showDialog(self):

        fname = QFileDialog.getOpenFileName(self, 'Open file', '/home')

        if fname[0]:
            f = open(fname[0], 'r')

            with f:
                data = f.read()
                self.textEdit.setText(data)
                print(data)
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
from PyQt5.QtWidgets import QWidget, QCheckBox, QApplication
from PyQt5.QtCore import Qt
import sys

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        cb = QCheckBox('改改改', self)
        cb.move(20, 20)
        cb.toggle()
        cb.stateChanged.connect(self.changeTitle)

        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('真正的标题')
        self.show()


    def changeTitle(self, state):

        if state == Qt.Checked:
            self.setWindowTitle('假装有标题')
        else:
            self.setWindowTitle('没了')


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
from PyQt5.QtWidgets import (QWidget, QPushButton,
    QFrame, QApplication)
from PyQt5.QtGui import QColor
import sys

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        self.col = QColor(0, 0, 0)

        redb = QPushButton('Red', self)
        redb.setCheckable(True)
        redb.move(10, 10)

        redb.clicked[bool].connect(self.setColor)

        greenb = QPushButton('Green', self)
        greenb.setCheckable(True)
        greenb.move(10, 60)

        greenb.clicked[bool].connect(self.setColor)

        blueb = QPushButton('Blue', self)
        blueb.setCheckable(True)
        blueb.move(10, 110)

        blueb.clicked[bool].connect(self.setColor)

        self.square = QFrame(self)
        self.square.setGeometry(150, 20, 100, 100)
        self.square.setStyleSheet("QWidget { background-color: %s }" %
            self.col.name())

        self.setGeometry(300, 300, 280, 170)
        self.setWindowTitle('Toggle button')
        self.show()


    def setColor(self, pressed):

        source = self.sender()

        if pressed:
            val = 255
        else:
            val = 0

        if source.text() == "Red":
            self.col.setRed(val)
        elif source.text() == "Green":
            self.col.setGreen(val)
        else:
            self.col.setBlue(val)

        self.square.setStyleSheet("QFrame { background-color: %s }" %
            self.col.name())


if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

python复制代码
from PyQt5.QtWidgets import (QWidget, QSlider,
                             QLabel, QApplication)
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap
import sys


class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):

        sld = QSlider(Qt.Horizontal, self)
        sld.setFocusPolicy(Qt.NoFocus)
        sld.setGeometry(30, 40, 100, 30)
        sld.valueChanged[int].connect(self.changeValue)

        self.label = QLabel(self)
        self.label.setPixmap(QPixmap('images/logo.png'))
        self.label.setGeometry(160, 40, 80, 30)

        self.setGeometry(300, 300, 280, 170)
        self.setWindowTitle('s什么鸡儿玩意r')
        self.show()

    def changeValue(self, value):

        if value == 0:
            self.label.setPixmap(QPixmap('images/1.png'))
        elif value > 0 and value <= 30:
            self.label.setPixmap(QPixmap('images/2.png'))
        elif value > 30 and value < 80:
            self.label.setPixmap(QPixmap('images/3.png'))
        else:
            self.label.setPixmap(QPixmap('images/4.png'))


app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

python复制代码
from PyQt5.QtWidgets import (QWidget, QProgressBar,
    QPushButton, QApplication)
from PyQt5.QtCore import QBasicTimer
import sys

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        self.pbar = QProgressBar(self)
        self.pbar.setGeometry(30, 40, 200, 25)

        self.btn = QPushButton('走你', self)
        self.btn.move(40, 80)
        self.btn.clicked.connect(self.doAction)

        self.timer = QBasicTimer()
        self.step = 0

        self.setGeometry(300, 300, 280, 170)
        self.setWindowTitle('进度条就比较强了')
        self.show()


    def timerEvent(self, e):

        if self.step >= 200:
            self.timer.stop()
            self.btn.setText('完成吧')
            return

        self.step = self.step + 1
        self.pbar.setValue(self.step)

    def doAction(self):

        if self.timer.isActive():
            self.timer.stop()
            self.btn.setText('走走走')
        else:
            self.timer.start(200, self)
            self.btn.setText('停,呗走了')


if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

python复制代码
from PyQt5.QtWidgets import (QWidget, QCalendarWidget,
    QLabel, QApplication, QVBoxLayout)
from PyQt5.QtCore import QDate
import sys

class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()


    def initUI(self):

        vbox = QVBoxLayout(self)

        cal = QCalendarWidget(self)
        cal.setGridVisible(True)
        cal.clicked[QDate].connect(self.showDate)

        vbox.addWidget(cal)

        self.lbl = QLabel(self)
        date = cal.selectedDate()
        self.lbl.setText(date.toString())

        vbox.addWidget(self.lbl)

        self.setLayout(vbox)

        self.setGeometry(300, 300, 350, 300)
        self.setWindowTitle('看日历，认准我')
        self.show()


    def showDate(self, date):

        self.lbl.setText(date.toString())

if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())