Python 3.6.2 - multiple __init__; multiple classes at once
我有两个脚本在分离时根据需要运行。一个是Pyqt5图形用户界面应用程序的代码，第二个是与此非常相似的代码，稍作修改，以便在出现任何引起问题的笑脸时能够转换内容。
基本上，当我按下应用程序窗口中的某个按钮时，我希望运行第二个代码。
无论我多么努力地适应第二个代码，它总是会使我的应用程序(或python)崩溃。我能做到的最远的一点是，当我关闭主窗口后第二个代码工作时，它就会运行，并给我想要的结果。
我怀疑这与第二个代码中的
我的应用程序：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | #'all the necessary imports' class MainWindow(QWidget): def __init__(self, parent=None): super(MainWindow, self).__init__(parent) self.text = QWebEngineView(self) self.proc_btn = QPushButton('Proceed') self.userUrl = QLineEdit(self) self.labOne = QLabel(self) self.labTwo = QLabel(self) self.defUrl = 'default' self.init_ui() def init_ui(self): v_layout = QVBoxLayout() h_layout = QHBoxLayout() h_layout.addWidget(self.proc_btn) h_layout.addWidget(self.userUrl) v_layout.addWidget(self.text) v_layout.addWidget(self.labOne) v_layout.addWidget(self.labTwo) v_layout.addLayout(h_layout) self.labOne.setText('URL: ') self.labTwo.setText('<ENTER LINK PLEASE>') self.userUrl.returnPressed.connect(self.linkPut) self.proc_btn.clicked.connect(self.doStuff) self.setLayout(v_layout) self.setWindowTitle('Scrapper') self.show() def doStuff(self): print('Doing stuff (expecting 2nd script to be ran)') def linkPut(self): newText = (self.userUrl.text()) print('newText: ' + newText) self.labTwo.setText(newText) self.defUrl = newText app = QApplication(sys.argv) a_window = MainWindow() sys.exit(app.exec_()) |
我需要实现的脚本：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | #'all necessary imports' class Page(QWebEnginePage): def __init__(self, url): self.app = QApplication(sys.argv) QWebEnginePage.__init__(self) self.html = '' self.loadFinished.connect(self._on_load_finished) self.load(QUrl(url)) self.app.exec_() print('__init__ WORKS') def _on_load_finished(self): self.html = self.toHtml(self.Callable) print('Load finished') def Callable(self, html_str): self.html = html_str self.app.quit() _nonbmp = re.compile(r'[\U00010000-\U0010FFFF]') def _surrogatepair(match): char = match.group() assert ord(char) > 0xffff encoded = char.encode('utf-16-le') return ( chr(int.from_bytes(encoded[:2], 'little')) + chr(int.from_bytes(encoded[2:], 'little'))) def with_surrogates(text): return _nonbmp.sub(_surrogatepair, text) def main(): page = Page('https://somenicepage.com/') soup = bs.BeautifulSoup(page.html, 'html.parser')) longStrCoded = str(soup.find("img", {"class":"pictures"})) longStr = with_surrogates(longStrCoded) print('long str: ' + longStr) extract = longStr.split('src="')[1].split('"')[0] print(extract) if __name__ == '__main__': main() |
号
问题是，在组合两个文件时，您试图创建多个
通常，您将创建和启动靠近程序入口点的
1 2 3 4 | if __name__ == '__main__': app = QtWidgets.QApplication(sys.argv) # Instantiate application window = MainWindow() # The rest of your program logic should flow from here sys.exit(app.exec_()) # Start application event loop |
基于您的原始类，这里有一个版本，它使用回调在HTML完全加载后继续处理它。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | class Page(QtWebEngineWidgets.QWebEnginePage): def __init__(self, url): super(Page, self).__init__() self.url = QtCore.QUrl(url) self.callback = None self.html = '' self.loadFinished.connect(self.on_load_finished) def load_html(self, callback=None): self.callback = callback self.load(self.url) def on_load_finished(self): self.toHtml(self.on_html_ready) def on_html_ready(self, html): self.html = html if self.callback: self.callback(html) |
号
接下来，定义将处理加载页面的回调。在这里，您可以放置来自
1 2 3 4 5 6 7 | def do_stuff(html): soup = bs.BeautifulSoup(html, 'html.parser')) longStrCoded = str(soup.find("img", {"class":"pictures"})) longStr = with_surrogates(longStrCoded) print('long str: ' + longStr) extract = longStr.split('src="')[1].split('"')[0] print(extract) |
最后，您将在
1 2 3 | def doStuff(self): self.page = Page(self.userUrl.text()) self.page.load_html(callback=do_stuff) |
。
注意此处使用