我一直在研究一个非常简单的脚本，它从stackoverflow中的python标签获取问题标题，并在QTextBrowser中显示它们。
应用程序按预期工作（至少在开始时）但是窗口没有显示，直到它完成加载网页并且刷新按钮冻结程序，直到它加载也有办法解决这个问题吗？这是完整的代码：
#! usr/bin/env python
from PyQt4.QtGui import *
import requests
from bs4 import BeautifulSoup
import lxml
from threading import Thread
class Form(QWidget):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
self.url = "http://www.stackoverflow.com/questions/tagged/python"
self.browser = QTextBrowser()
self.connectionlabel = QLabel()
self.refreshBtn = QPushButton("Refresh")
self.refreshBtn.clicked.connect(self.get)
layout = QGridLayout()
layout.addWidget(self.connectionlabel, 0, 0)
layout.addWidget(self.refreshBtn, 0, 1)
layout.addWidget(self.browser, 1, 0,1,2)
self.setLayout(layout)
self.setWindowTitle("StackOverflow: Python")
def get(self):
self.browser.clear()
self.connectionlabel.setText("Connecting.....")
try:
response = requests.get(self.url)
soup = BeautifulSoup(response.content, 'lxml')
self.connectionlabel.setText("Connected.")
questions = soup.find_all("a", {"class": "question-hyperlink"})
for i, questionTitle in enumerate(questions):
try:
self.browser.append("\n"+str(i+1)+". "+questionTitle.text)
except:
pass
except:
self.connectionlabel.setText("Couldn't connect.")
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
screen = Form()
screen.show()
t = Thread(screen.get)
t.deamon = True
t.start()
sys.exit(app.exec_())