python导入数据库的数据怎么在qt界面里刷新_python爬虫开发通过qt界面显示，爬取数据只能显示最后一次循环结果，appen追加时程序卡住。（已经解决）！！！...

源码如下：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'day01.ui'

# Created by: PyQt5 UI code generator 5.13.2

# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

import sys

import requests

from bs4 import BeautifulSoup

import bs4

import os

import time

os.environ["CUDA_VISIBLE_DEVICES"] = "-1"

class Ui_mainWindow(object):

def setupUi(self, mainWindow):

mainWindow.setObjectName("mainWindow")

mainWindow.resize(1200, 400)

self.centralwidget = QtWidgets.QWidget(mainWindow)

self.centralwidget.setObjectName("centralwidget")

self.pushButton = QtWidgets.QPushButton(self.centralwidget)

self.pushButton.setEnabled(True)

self.pushButton.setGeometry(QtCore.QRect(1000, 20, 93, 28))

self.pushButton.setObjectName("pushButton")

self.textEdit = QtWidgets.QTextEdit(self.centralwidget)

self.textEdit.setGeometry(QtCore.QRect(140, 80,600, 100))

self.textEdit.setObjectName("textEdit")

self.label = QtWidgets.QLabel(self.centralwidget)

self.label.setGeometry(QtCore.QRect(40, 70, 91, 61))

self.label.setObjectName("label")

mainWindow.setCentralWidget(self.centralwidget)

self.menubar = QtWidgets.QMenuBar(mainWindow)

self.menubar.setGeometry(QtCore.QRect(0, 0, 815, 26))

self.menubar.setObjectName("menubar")

mainWindow.setMenuBar(self.menubar)

self.statusbar = QtWidgets.QStatusBar(mainWindow)

self.statusbar.setObjectName("statusbar")

mainWindow.setStatusBar(self.statusbar)

self.textEdit.setText('预备，点击开始 ')

self.retranslateUi(mainWindow)

QtCore.QMetaObject.connectSlotsByName(mainWindow)

self.pushButton.clicked.connect(self.mypachong)

#QtWidgets.QApplication.processEvents() # 界面实时刷新

# QtWidgets.QApplication.processEvents()

def mypachong(self):

self.head ={'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36','Connection': 'close'}

self.url = 'https://mil.ifeng.com'

self.r = requests.get(self.url,headers=self.head,timeout=30)

self.r.encoding = 'utf-8'

self.soup = BeautifulSoup(self.r.text, 'lxml')

self.data = self.soup.select( 'p>a')

print('元素类型：',type(self.data))

print('元素数量：',len(self.data))

print(self.data)

for i in range(9):

x = self.data[i].get('href')

urls='http:'+x

print(urls)

html=requests.get(urls)

html.encoding='utf-8'

soups=BeautifulSoup(html.text,'lxml')

wenben=soups.select('#root > div > div.content-3--Ol8sK > div.leftContent-1ESnktbA > div.artical-_Qk9Dp2t > div.main_content-LcrEruCc > div:nth-child(1) > div.text-3zQ3cZD4')[0].text

print(wenben)

self.textEdit.setText(wenben)

def retranslateUi(self, mainWindow):

_translate = QtCore.QCoreApplication.translate

mainWindow.setWindowTitle(_translate("mainWindow", "天下无双"))

self.pushButton.setText(_translate("mainWindow", "点我"))

self.label.setText(_translate("mainWindow", "情报："))

if __name__== '__main__':

app = QtWidgets.QApplication(sys.argv)

MainWindow = QtWidgets.QMainWindow()

ui = Ui_mainWindow()

ui.setupUi(MainWindow)

MainWindow.show()

sys.exit(app.exec_())

修改的地方:(一)加入list=[],注意放在下面主函数内，

(二)select方法后用[0].text.split()

(三)将最后的列表str化后放入textEdit。效果如下：

完整代码：