窗口和异步asyncio http

.settings/org.eclipse.core.resources.prefs

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+encoding//\u7A97\u53E3\u914D\u5408\u5F02\u6B65Http/AsyncioUiClient.py=utf-8
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README.md

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 #### 2.3 其他案例
 - [ 人脸描点检测](人脸描点检测/)
 - [ 网络操作](网络操作/)
+- [ 窗口和异步asyncio http](窗口配合异步Http/)
 - [ QRC资源文件使用](QRC资源文件使用/)
 - [ C和C++扩展](C和C++扩展/)
     - [.1 pyx和c++](C和C++扩展/pyx和c++/)

窗口配合异步Http/AsyncioUiClient.py

@@ -0,0 +1,142 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2018年10月24日
+@author: Irony
+@site: https://github.com/892768447
+@email: 892768447@qq.com
+@file: AsyncioUiClient
+@description: 
+"""
+import asyncio
+
+from PyQt5.QtCore import Qt
+from PyQt5.QtGui import QPixmap, QMovie
+from PyQt5.QtWidgets import QWidget, QVBoxLayout, QPushButton,\
+    QApplication, QListWidget, QListWidgetItem, QLabel, QMessageBox
+import aiohttp
+from quamash import QEventLoop
+
+
+__Author__ = """By: Irony
+QQ: 892768447
+Email: 892768447@qq.com"""
+__Copyright__ = "Copyright (c) 2018 Irony"
+__Version__ = "Version 1.0"
+
+Url = 'https://www.doutula.com/api/search?keyword=%E6%9C%80%E6%96%B0%E8%A1%A8%E6%83%85&mime=0&page={}'
+Headers = {
+    ':authority': 'www.doutula.com',
+    ':method': 'GET',
+    ':scheme': 'https',
+    'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
+    'accept-language': 'zh-CN,zh;q=0.9',
+    'cache-control': 'max-age=0',
+    'dnt': '1',
+    'upgrade-insecure-requests': '1',
+    'user-agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.26 Safari/537.36 Core/1.63.6756.400 QQBrowser/10.2.2498.400'
+}
+
+
+class Window(QWidget):
+
+    def __init__(self, *args, **kwargs):
+        super(Window, self).__init__(*args, **kwargs)
+        layout = QVBoxLayout(self)
+        self.listWidget = QListWidget(self)
+        self.listWidget.setSpacing(2)  # item直接的间隔
+        # 隐藏横向滚动条
+        self.listWidget.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
+        # 让list 从左到右排列
+        self.listWidget.setFlow(self.listWidget.LeftToRight)
+        # 自动换行
+        self.listWidget.setWrapping(True)
+        self.listWidget.setResizeMode(self.listWidget.Adjust)
+
+        self.buttonMsg = QPushButton('弹出提示框', self, clicked=self.showMessage)
+        self.buttonDown = QPushButton('下载图片', self, clicked=self.doDownload)
+        layout.addWidget(self.listWidget)
+        layout.addWidget(self.buttonMsg)
+        layout.addWidget(self.buttonDown)
+        self.currentPage = 0
+        self.initSession()  # 其实没必要，session主要用在需要登录的网站。缓存cookie用
+
+    def initSession(self):
+        async def _initSession():
+            # 初始化session
+            self.session = aiohttp.ClientSession(loop=loop)
+            print(self.session)
+        asyncio.ensure_future(_initSession(), loop=loop)
+
+    async def _doDownloadImage(self, url):
+        # 下载图片并添加到界面
+        async with self.session.get(url) as resp:
+            data = await resp.read()
+            if not data:
+                print('下载失败: ', url)
+                return
+            path = os.path.join('tmp', os.path.basename(url))
+            with open(path, 'wb') as fp:
+                fp.write(data)
+            item = QListWidgetItem(url, self.listWidget)
+            image = QPixmap(path)
+            item.setSizeHint(image.size())
+            label = QLabel(self.listWidget)
+            label.setPixmap(image)
+            if path.endswith('.gif'):  # 可能是动态图
+                label.setMovie(QMovie(path))
+            self.listWidget.setItemWidget(item, label)
+            self.listWidget.scrollToBottom()
+
+    async def _doDownload(self):
+        # 下载工作
+        if self.currentPage == -1:
+            QMessageBox.information(self, '提示', '已经没有更多了')
+            return
+        self.currentPage += 1
+        url = Url.format(self.currentPage)
+        print('get url: ', url)
+        async with self.session.get(url, headers=Headers) as resp:
+            data = await resp.json()
+            if not data:
+                return
+            data = data.get('data', None)
+            if not data:
+                self.currentPage = -1
+                print('已经是最后一页了')
+                return
+            # 解析json并生成item添加到界面中
+            for entity in data.get('list', []):
+                url = entity.get('image_url', None)
+                if not url:
+                    continue
+                await self._doDownloadImage(url)  # 下载图片
+
+    def doDownload(self):
+        # 响应按钮点击调用
+        asyncio.ensure_future(self._doDownload(), loop=loop)
+
+    def showMessage(self):
+        # 显示对话框
+        app.aboutQt()
+
+    def closeEvent(self, event):
+        if not self.session.closed:
+            asyncio.ensure_future(self.session.close(), loop=loop)
+        super(Window, self).closeEvent(event)
+
+
+if __name__ == '__main__':
+    import sys
+    import cgitb
+    import os
+    os.makedirs('tmp', exist_ok=True)
+    sys.excepthook = cgitb.enable(1, None, 5, 'text')
+    app = QApplication(sys.argv)
+    loop = QEventLoop(app)
+    asyncio.set_event_loop(loop)
+    w = Window()
+    w.show()
+    with loop:
+        loop.run_forever()

窗口配合异步Http/README.md

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+# asyncio结合PyQt例子
+
+### [Python3.5][PyQt5]
+
+依赖库：
+    quamash（对QT事件循环的封装替换）：https://github.com/harvimt/quamash
+    asyncio：https://docs.python.org/3/library/asyncio.html
+    aiohttp：https://aiohttp.readthedocs.io/en/stable/
+
+1、在创建QApplication后随即设置替换事件循环loop
+```python
+app = QApplication(sys.argv)
+loop = QEventLoop(app)
+asyncio.set_event_loop(loop)
+w = Window()
+```
+
+2、通过asyncio.ensure_future(函数(), loop=loop)来执行某个异步函数
+
+Window　　→→　　initSession（初始化session）<br/>
+　↓<br/>
+　↓<br/>
+下载按钮　　→→　　doDownload（执行_doDownload方法）<br/>
+　　　　　　　　　　　↓<br/>
+　　　　　　　　　　　↓<br/>
+　　　　　　　　　　session.get（下载json数据进行解析）<br/>
+　　　　　　　　　　　↓<br/>
+　　　　　　　　　　　↓<br/>
+添加到界面　　←←　　_doDownloadImage（对单张图片进行下载）
+
+# 截图
+![截图1](ScreenShot/1.gif)