Python PyQt5进度条没有进展

Question

所以基本上我有程序，旨在显示在后台逐行读取excel文件的进度。到目前为止，我有以下代码：

excelresult.py：

from PyQt5 import QtCore, QtGui, QtWidgets 
from PyQt5.QtCore import pyqtSlot 
from PyQt5.QtCore import Qt, QBasicTimer 
import os, sys, xlrd, threading, time, pythoncom 
import win32com.client 
from time import sleep 
from test import MyGlobals 


class ExcelCheck(threading.Thread): 
progPercent = 0 

def __init__(self): 
    threading.Thread.__init__(self) 
    self.event = threading.Event() 

def run(self): 
    pythoncom.CoInitialize() 
    try: 
     while not self.event.is_set(): 
      excel = win32com.client.Dispatch("Excel.Application") 
      wb = excel.ActiveWorkbook 
      ws = wb.Worksheets("TC") 
      va_title = ws.Range(ws.Range('I7'), ws.Range('I700')) 
      i = 0 
      for r in va_title.Cells: 
       if r.Text != '': 
        i = i + 1 
        # print(r.Text) 
      # print(i) 
      # print(round(i/178.0 * 100,0)) 
      # rounding off 
      progPercent = round(i/178.0 * 100.0) 
      MyGlobals.x=progPercent 

      print(progPercent) 
     return progPercent 
    except: 
     print('Excel is not executed') 



     # sleep(1) 
     # self.event.wait() 

def stop(self): 
    self.event.set() 

scm.py

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

from PyQt5 import QtCore, QtGui, QtWidgets 
from PyQt5.QtCore import pyqtSlot 
from PyQt5.QtCore import QObject, pyqtSignal 
from PyQt5.QtCore import Qt, QBasicTimer 
import os, sys, xlrd, win32com.client, xlwt, threading, time 
from time import sleep 
from ExcelResult import * 
from test import MyGlobals 
import threading 

class Ui_MainWindow(object): 
def __init__(self): 
    super().__init__() 
    self.btn_active = False 
    print('init_false') 


def startBtnClicked(self): 
    self.btnStart.setText('start!') 
    self.btn_active = True 

    print(self.btn_active) 
    tmr = ExcelCheck() 
    tmr.start() 

    while(MyGlobals.x<=100): 

     #print (MyGlobals.x) 
     self.progressBar.setValue(MyGlobals.x) 

    # self.progressBar.minimum = 1 
    # self.progressBar.maximum = 100 
    # for progPercent in range(1, 101): 
    #  self.progressBar.setValue(progPercent) 
    #  time.sleep(1) 
def exitBtnClicked(self): 
    # self.ExcelCheck() 
    self.btn_active = False 
    print(self.btn_active) 
    # os.system("taskkill /f /im Scm21.Client.exe") 
    # self.close() 
    # Stop the progress of python 
    self.sys.exit() 
    tmr = ExcelCheck() 
    tmr.stop() 

def setupUi(self, MainWindow): 
    MainWindow.setObjectName("MainWindow") 
    MainWindow.resize(446, 207) 

    self.centralwidget = QtWidgets.QWidget(MainWindow) 
    self.centralwidget.setObjectName("centralwidget") 

    self.progressBar = QtWidgets.QProgressBar(self.centralwidget) 
    self.progressBar.setGeometry(QtCore.QRect(40, 70, 381, 23)) 
    self.progressBar.setProperty("value", 0) 
    self.progressBar.setObjectName("progressBar") 

    self.btnStart = QtWidgets.QPushButton(self.centralwidget) 
    self.btnStart.setGeometry(QtCore.QRect(110, 110, 75, 23)) 
    self.btnStart.setObjectName("btnStart") 
    self.btnStart.clicked.connect(self.startBtnClicked) 

    self.btnExit = QtWidgets.QPushButton(self.centralwidget) 
    self.btnExit.setGeometry(QtCore.QRect(260, 110, 75, 23)) 
    self.btnExit.setObjectName("btnExit") 
    self.btnExit.clicked.connect(self.exitBtnClicked) 

    MainWindow.setCentralWidget(self.centralwidget) 
    self.menubar = QtWidgets.QMenuBar(MainWindow) 
    self.menubar.setGeometry(QtCore.QRect(0, 0, 446, 21)) 
    self.menubar.setObjectName("menubar") 
    MainWindow.setMenuBar(self.menubar) 
    self.statusbar = QtWidgets.QStatusBar(MainWindow) 
    self.statusbar.setObjectName("statusbar") 
    MainWindow.setStatusBar(self.statusbar) 
    self.retranslateUi(MainWindow) 
    QtCore.QMetaObject.connectSlotsByName(MainWindow) 

def retranslateUi(self, MainWindow): 
    _translate = QtCore.QCoreApplication.translate 
    MainWindow.setWindowTitle(_translate("MainWindow", "SCM21")) 
    self.btnStart.setText(_translate("MainWindow", "Start")) 
    self.btnExit.setText(_translate("MainWindow", "Exit")) 


if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    MainWindow = QtWidgets.QMainWindow() 
    ui = Ui_MainWindow() 
    ui.setupUi(MainWindow) 
    MainWindow.show() 
    sys.exit(app.exec_()) 

，并test.py

class MyGlobals(object): 
    x = 0 

所以，我能够使用test.py将ExcelResult.py中的ProgPercent的值导入scm.py，但完全不知道如何更新prog ressbar值。

我试过使用循环，但它挂起了GUI。

谢谢。

Answer 1

使用的QThread：

import time 
from PyQt5 import QtCore 
from PyQt5 import QtWidgets 


class ExcelCheck(QtCore.QThread): 
    updated = QtCore.pyqtSignal(int) 
    running = False 

    def __init__(self, parent=None): 
     super(ExcelCheck, self).__init__(parent) 
     self.progPercent = 0 
     self.running = True 

    def run(self): 
     while self.running: 
      self.progPercent += 1 
      self.progPercent %= 100 
      self.updated.emit(int(self.progPercent)) 
      time.sleep(0.1) 

    def stop(self): 
     self.running = False 


class MainWindow(QtWidgets.QMainWindow): 
    def __init__(self, parent=None): 
     super(MainWindow, self).__init__(parent=parent) 
     self.setupUi(self) 
     self.btn_active = False 

    def startBtnClicked(self): 
     self.btnStart.setText('start!') 
     self.btn_active = True 
     self.tmr = ExcelCheck(self) 
     self.tmr.updated.connect(self.updateValue) 
     self.tmr.start() 

    def updateValue(self, data): 
     self.progressBar.setValue(data) 

    def exitBtnClicked(self): 
     # self.ExcelCheck() 
     self.btn_active = False 
     self.tmr.stop() 
     self.sys.exit() 

    def setupUi(self, MainWindow): 
     MainWindow.setObjectName("MainWindow") 
     MainWindow.resize(446, 207) 

     self.centralwidget = QtWidgets.QWidget(MainWindow) 
     self.centralwidget.setObjectName("centralwidget") 

     self.progressBar = QtWidgets.QProgressBar(self.centralwidget) 
     self.progressBar.setGeometry(QtCore.QRect(40, 70, 381, 23)) 
     self.progressBar.setProperty("value", 0) 
     self.progressBar.setObjectName("progressBar") 

     self.btnStart = QtWidgets.QPushButton(self.centralwidget) 
     self.btnStart.setGeometry(QtCore.QRect(110, 110, 75, 23)) 
     self.btnStart.setObjectName("btnStart") 
     self.btnStart.clicked.connect(self.startBtnClicked) 

     self.btnExit = QtWidgets.QPushButton(self.centralwidget) 
     self.btnExit.setGeometry(QtCore.QRect(260, 110, 75, 23)) 
     self.btnExit.setObjectName("btnExit") 
     self.btnExit.clicked.connect(self.exitBtnClicked) 

     MainWindow.setCentralWidget(self.centralwidget) 
     self.menubar = QtWidgets.QMenuBar(MainWindow) 
     self.menubar.setGeometry(QtCore.QRect(0, 0, 446, 21)) 
     self.menubar.setObjectName("menubar") 
     MainWindow.setMenuBar(self.menubar) 
     self.statusbar = QtWidgets.QStatusBar(MainWindow) 
     self.statusbar.setObjectName("statusbar") 
     MainWindow.setStatusBar(self.statusbar) 
     self.retranslateUi(MainWindow) 
     QtCore.QMetaObject.connectSlotsByName(MainWindow) 

    def retranslateUi(self, MainWindow): 
     _translate = QtCore.QCoreApplication.translate 
     MainWindow.setWindowTitle(_translate("MainWindow", "SCM21")) 
     self.btnStart.setText(_translate("MainWindow", "Start")) 
     self.btnExit.setText(_translate("MainWindow", "Exit")) 


if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    w = MainWindow() 
    w.show() 
    sys.exit(app.exec_())