当GUI关闭时，如何在后台运行Python程序？但是GUI可以恢复

Question

不管怎么说，我可以这样运行这个程序。

在程序开始时，GUI显示和后台进程开始运行。用户可以随时关闭和打开GUI。但是后台进程不间断地运行。

这是我目前的密码。4节课。

1. FileHandler
2. Scanner <-从QThread
3. UserInterface <-继承QMainWindow作为参数
4. Main <-从UserInterface

继承

import math
import sys
import time
import psutil
import win32gui
import win32process
import threading
import atexit
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtChart import QChart, QChartView, QPieSeries
from PyQt5.QtCore import QThread, pyqtSignal

RECORDED_PROGRAMS = {}

class FileHandler():
    def __init__ (self):
        print("[+] Driver File Initiated...")
        self.logFile = open("log.txt", "a+")
        self.dataFile = open("data.txt", "a+")

    def readFile(self):
        pass

    def writeFile(self):
        print("[+] {} : Writing Data to the File...".format(time.strftime("%H:%M:%S".format(time.localtime()))))
        self.dataFile.write("\nOn Write : {} : ".format(time.strftime("%H:%M:%S".format(time.localtime()))) + str(RECORDED_PROGRAMS))

    def closeFile(self):
        print("[+] File Handler Exiting...")
        print("[+] Closing File...")
        self.dataFile.write("\nOn Exit  : {} : ".format(time.strftime("%H:%M:%S".format(time.localtime()))) + str(RECORDED_PROGRAMS))
        self.dataFile.write("\n=================================================================================")
        self.dataFile.write("\n[!] Program Exited. TimeStamp: {}".format(time.strftime("%H:%M:%S", time.localtime())))
        self.dataFile.write("\n=================================================================================")
        self.dataFile.close()
        self.logFile.close()
#==============================================================================================================
class Scanner(QThread):

    signal = pyqtSignal(bool)
    
    def run(self):
        print("[+] Scanner Initialized...")
        count = 0
        while True:
            count += 1
            try:
                activeWindowId = win32gui.GetForegroundWindow()
                threadList = win32process.GetWindowThreadProcessId(activeWindowId)
                mainThreadName = psutil.Process(threadList[-1]).name()

                if(mainThreadName in RECORDED_PROGRAMS.keys()):
                    RECORDED_PROGRAMS[mainThreadName] += 1
                else:
                    RECORDED_PROGRAMS[mainThreadName] = 1
            except Exception as E:
                print("[-] Error in Scanner...")
                print("======================================================")
                print(E)
                print("======================================================")

            if count == 60:
                self.signal.emit(True)
                count = 0
            time.sleep(1)

#==============================================================================================================
class UserInterface():
    def __init__(self, MainWindow):
        self.setupUi(MainWindow)

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(640, 480)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
        MainWindow.setSizePolicy(sizePolicy)
        MainWindow.setMinimumSize(QtCore.QSize(640, 480))
        MainWindow.setMaximumSize(QtCore.QSize(640, 480))
        font = QtGui.QFont()
        font.setFamily("Bahnschrift")
        font.setPointSize(14)
        MainWindow.setFont(font)

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

        self.centralWidgetHLayout = QtWidgets.QHBoxLayout(self.centralwidget)
        self.centralWidgetHLayout.setObjectName("centralWidgetHLayout")

        self.leftGroupBox = QtWidgets.QGroupBox(self.centralwidget)
        self.leftGroupBox.setMinimumSize(QtCore.QSize(300, 462))
        self.leftGroupBox.setMaximumSize(QtCore.QSize(300, 462))
        self.leftGroupBox.setObjectName("leftGroupBox")

        self.leftGroupVLayout = QtWidgets.QVBoxLayout(self.leftGroupBox)
        self.leftGroupVLayout.setContentsMargins(5, 5, 5, 5)
        self.leftGroupVLayout.setSpacing(5)
        self.leftGroupVLayout.setObjectName("leftGroupVLayout")

        self.widget = QtWidgets.QWidget(self.leftGroupBox)
        self.widget.setMinimumSize(QtCore.QSize(288, 427))
        self.widget.setMaximumSize(QtCore.QSize(288, 427))
        self.widget.setObjectName("widget")
        self.widgetLayout = QtWidgets.QVBoxLayout(self.widget)
        self.widgetLayout.setContentsMargins(0, 0, 0, 0)
        self.widgetLayout.setSpacing(0)
        self.widgetLayout.setObjectName("widgetLayout")

        self.series = QPieSeries()
        self.chart = QChart()
        self.chart.addSeries(self.series)
        self.chartView = QChartView(self.chart)
        self.chart.setAnimationOptions(QChart.SeriesAnimations)
        self.chart.legend().hide()

        self.widgetLayout.addWidget(self.chartView)
        self.leftGroupVLayout.addWidget(self.widget)
        self.centralWidgetHLayout.addWidget(self.leftGroupBox)

        self.rightGroupBox = QtWidgets.QGroupBox(self.centralwidget)
        self.rightGroupBox.setMinimumSize(QtCore.QSize(316, 462))
        self.rightGroupBox.setMaximumSize(QtCore.QSize(316, 462))
        self.rightGroupBox.setObjectName("rightGroupBox")

        self.rightGroupVLayout = QtWidgets.QVBoxLayout(self.rightGroupBox)
        self.rightGroupVLayout.setContentsMargins(5, 5, 5, 5)
        self.rightGroupVLayout.setSpacing(5)
        self.rightGroupVLayout.setObjectName("rightGroupVLayout")

        self.tableView = QtWidgets.QTableWidget(self.rightGroupBox)
        self.tableView.setMinimumSize(QtCore.QSize(304, 427))
        self.tableView.setMaximumSize(QtCore.QSize(304, 427))
        self.tableView.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.tableView.setFrameShadow(QtWidgets.QFrame.Plain)
        self.tableView.setLineWidth(1)
        self.tableView.setMidLineWidth(0)
        self.tableView.setObjectName("tableView")
        self.tableView.setColumnCount(2)
        self.tableView.setRowCount(0)

        item = QtWidgets.QTableWidgetItem()
        self.tableView.setHorizontalHeaderItem(0, item)
        item = QtWidgets.QTableWidgetItem()

        self.tableView.setHorizontalHeaderItem(1, item)
        self.tableView.horizontalHeader().setVisible(True)
        self.tableView.horizontalHeader().setDefaultSectionSize(150)
        self.tableView.horizontalHeader().setHighlightSections(False)
        self.tableView.horizontalHeader().setMinimumSectionSize(150)
        self.tableView.verticalHeader().setVisible(True)
        self.tableView.verticalHeader().setDefaultSectionSize(31)

        self.rightGroupVLayout.addWidget(self.tableView)
        self.centralWidgetHLayout.addWidget(self.rightGroupBox)
        MainWindow.setCentralWidget(self.centralwidget)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.leftGroupBox.setTitle(_translate("MainWindow", "Top 10 Overview"))
        self.rightGroupBox.setTitle(_translate("MainWindow", "Recorded Programs"))
        self.tableView.setSortingEnabled(True)
        item = self.tableView.horizontalHeaderItem(0)
        item.setText(_translate("MainWindow", "Program Name"))
        item = self.tableView.horizontalHeaderItem(1)
        item.setText(_translate("MainWindow", "Time (mins)"))

        MainWindow.show()

    
#===========================================================================================================================
class Main(UserInterface):
    def __init__(self, MainWindow):
        self.scanner = Scanner()
        self.fileHandler = FileHandler()
        self.runScanner()
        super().__init__(MainWindow)

    def runScanner(self):
        self.scanner.signal.connect(self.update)
        self.scanner.start()

    def update(self):
        self.updateChart()
        self.updateTable()
        self.updateLog()

    def updateChart(self):
        print("[+] Updating Chart...")
        self.chart.removeSeries(self.series)
        self.series.clear()
        for key, val in RECORDED_PROGRAMS.items():
            self.series.append(key, math.ceil(val/60))

        self.chart.addSeries(self.series)

    def updateTable(self):
        print("[+] Updating Table...")
        rowCount = len(RECORDED_PROGRAMS)
        self.tableView.setRowCount(rowCount)
        programNames = list(RECORDED_PROGRAMS.keys())
        timeRec = list(RECORDED_PROGRAMS.values())

        for row in range(rowCount):
            for column in range(2):
                if column == 0:
                    self.tableView.setItem(row, column, QtWidgets.QTableWidgetItem(str(programNames[row])))
                
                if column == 1:
                    self.tableView.setItem(row, column, QtWidgets.QTableWidgetItem(str(math.ceil(timeRec[row]/60))))

    def updateLog(self):
        print("[+] Updating Log...")
        self.fileHandler.writeFile()

    def quit(self):
        print("[+] Quitting Program...")
        self.scanner.terminate()
        self.fileHandler.closeFile()
#===========================================================================================================================
def _exit():
    print("[+] At Exit Func Triggered...")
    main.quit()

if __name__ == "__main__":
    guiApplication = QtWidgets.QApplication(sys.argv)
    window = QtWidgets.QMainWindow()
    main = Main(window)
    atexit.register(_exit)

    stop = False
    while not stop:
        answer = input("Stop [Y/N]? ")
        if answer == "Y":
            stop = True
        time.sleep(0.5)    
    
    print("[+] Main Loop Exit hit...")

Answer 1

有几种方法你可以做到这一点。您可以将其设置为使用self.hide()和self.show()隐藏窗口以再次显示它们，也可以在每个要隐藏的窗口上使用self.setVisible(False)。你可以通过它们来隐藏它们。您可以使用按钮打开一个窗口来调用函数以显示和隐藏它们，也可以使用另一个库(如pynput )设置键绑定来显示或隐藏窗口。当然，您应该为此创建一个单独的函数，并通过按钮或键绑定调用它，您可以通过检查if self.isVisible()来选择函数中的操作。名称不一定是self，它可以是您想要隐藏的每个名称，您可以遍历它们并使用一个理解函数或lambda函数。