[Python知识库]python + pyqt5 自制exe 随机换壁纸

问题描述：
选择自己图片目录，随机更换壁纸

效果演示

问题解决：

直接上代码：

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

# Form implementation generated from reading ui file 'd:\python code\05changePaperWindow.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.

import sys
import os
import platform
import random
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QMessageBox
import win32api, win32gui, win32con

class Ui_changePaperWindow(object):
    def setupUi(self, changePaperWindow):
        changePaperWindow.setObjectName("changePaperWindow")
        changePaperWindow.resize(400, 300)
        changePaperWindow.setIconSize(QtCore.QSize(24, 24))
        self.centralwidget = QtWidgets.QWidget(changePaperWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.showFoldText = QtWidgets.QLineEdit(self.centralwidget)
        self.showFoldText.setGeometry(QtCore.QRect(140, 50, 200, 50))
        self.showFoldText.setObjectName("showFoldText")
        self.selectFoldBtn = QtWidgets.QPushButton(self.centralwidget)
        self.selectFoldBtn.setGeometry(QtCore.QRect(40, 50, 70, 50))
        self.selectFoldBtn.setObjectName("selectFoldBtn")
        self.changeBtn = QtWidgets.QPushButton(self.centralwidget)
        self.changeBtn.setGeometry(QtCore.QRect(140, 140, 140, 80))
        self.changeBtn.setObjectName("changeBtn")
        changePaperWindow.setCentralWidget(self.centralwidget)

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

    def retranslateUi(self, changePaperWindow):
        _translate = QtCore.QCoreApplication.translate
        changePaperWindow.setWindowTitle(_translate("changePaperWindow", "随机更换壁纸"))
        self.showFoldText.setText(_translate("changePaperWindow", " 选择您需要随机更换壁纸的目录"))
        self.selectFoldBtn.setText(_translate("changePaperWindow", "选择目录"))
        self.changeBtn.setText(_translate("changePaperWindow", "马上随机更换壁纸"))

        # 给按钮赋点击功能
        self.selectFoldBtn.clicked.connect(self.selectFold)
        self.changeBtn.clicked.connect(self.changAction)

    imgArr = [] # 图片集合
    imgFold = '' # 选择的路径
    def selectFold(self): # 选择目录按钮
        fold = QtWidgets.QFileDialog.getExistingDirectory(None, "选取带图片的文件夹", "C:/") # 起始路径C
        self.imgFold = fold
        self.showFoldText.setText(fold)
        if (os.path.exists(fold)):
            list = os.listdir(fold)
            # print(list) # 列出文件
            for i in range(0, len(list)):
                filePath = os.path.join(fold, list[i])
                # 如果用index 方法，没有找到 jpg, png 会报 substring not found; 如果没有 > 1 这个选项，图片集合会出现 exe, dll 文件，不知道怎么回事
                if (os.path.isfile(filePath) and ( filePath.lower().find('jpg') > 1 or filePath.lower().find('png') > 1 ) ):
                    self.imgArr.append(filePath)
                else:
                    print(filePath + "不是文件")
        else:
            self.showFoldText.setText("您选择的目录不存在")

    def changAction(self):
        if (self.imgFold == ""):
            # return print("还没有选择图片路径")
            return QMessageBox.information(None, "请选择路径", "还没有选择路径", QMessageBox.Yes)
        elif(len(self.imgArr) < 1):
            return QMessageBox.information(None, "没有图片文件", "该文件夹下面没有图片文件", QMessageBox.Yes)

        system_version = platform.platform()
        system = system_version.split('-')[0]
        if system == 'Windows' or system == 'windows':
            randNmb = random.randint(0, len(self.imgArr))
        else:
            if os.path.exists('/temp/bg'):
                print('the temp folder exists')
            else:
                os.mkdir('temp/bg')

        imgRoot = self.imgArr[randNmb]
        self.changeWallpaper(imgRoot)

    def changeWallpaper(self, pic):
        system_version = platform.platform()
        print(system_version)
        system = system_version.split('-')[0]
        try:
            if system == 'Windows' or system == 'windows':
                regKey = win32api.RegOpenKeyEx(win32con.HKEY_CURRENT_USER, "Control Panel\\Desktop", 0, win32con.KEY_SET_VALUE)
                win32api.RegSetValueEx(regKey, "WallpaperStyle", 0, win32con.REG_SZ, "2")
                win32api.RegSetValueEx(regKey, "TileWallpaper", 0, win32con.REG_SZ, "0")
                # refresh screen
                win32gui.SystemParametersInfo(win32con.SPI_SETDESKWALLPAPER, pic, win32con.SPIF_SENDWININICHANGE)
            else:
                os.system('gsettings set org.gnome.desktop.background picture-uri "file:/tmp/img/bg.img"')
                os.system('gsettings set org.gnome.desktop.background picture-options "centered"')
        except:
            print('something wrong with detect system')

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    widget = QtWidgets.QMainWindow()
    window = Ui_changePaperWindow()
    window.setupUi(widget)
    widget.show()
    sys.exit(app.exec())