python--動態網頁渲染pyqt5

原文：https://blog.csdn.net/tymatlab/article/details/78647543

PyQt5 渲染動態網頁

示例代碼：

# -*- coding: UTF-8 -*-
import sys
from PyQt5.QtCore import QUrl
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWebEngineWidgets import QWebEnginePage, QWebEngineView
import lxml.html

class Render(QWebEngineView):               # 子類Render繼承父類QWebEngineView
    def __init__(self, url):
        self.html = ''
        self.app = QApplication(sys.argv)
        QWebEngineView.__init__(self)       # 子類構造函數繼承父類，這種寫法python2和3通用，還可以是super().__init__()
        self.loadFinished.connect(self._loadFinished)
        self.load(QUrl(url))
        self.app.exec_()

    def _loadFinished(self):
        self.page().toHtml(self.callable)

    def callable(self, data):
        self.html = data
        self.app.quit()


if __name__ == '__main__':
    url = 'http://example.webscraping.com/places/default/dynamic'

    r = Render(url)
    result = r.html

    tree = lxml.html.fromstring(result)
    a = tree.cssselect('#result')[0].text_content()
    print(a)

注意：

1.PyQt版本之間的區別

版本	用法
PyQt4	from PyQt4.QtWebKit import QWebPage, QWebView
PyQt5	from PyQt5.QtWebKitWidgets import QWebPage, QWebView
PyQt5.6+	from PyQt5.QtWebEngineWidgets import QWebEnginePage, QWebEngineView

可參考：

 

• 解決 No module named PyQt5.QtWebKitWidgets

• http://www.widlabs.com/article/no-module-named-pyqt5-qtwebkitwidgets

• Qt Documentation

2.PyQt4中的mainFrame在PyQt5中已廢棄

版本	用法
PyQt4	html = webview.page().mainFrame().toHtml()
PyQt5	self.page().toHtml(self.callable)

 

可參考：

• https://stackoverflow.com/questions/37754138/how-to-render-html-with-pyqt5s-qwebengineview