Pyqt 获取windows系统中已安装软件列表

开始之前的基础知识

1. 获取软件列表

在Python的标准库中，_winreg可以操作Windows的注册表。
获取已经安装的软件列表一般是读去windows的注册表： SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
读取注册表循环出list
正则出 “DisplayIcon” 包含“exe” 或 “ico”

         key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", 0, _winreg.KEY_ALL_ACCESS)
         for i in xrange(0, _winreg.QueryInfoKey(key)[0]-1):
             DisplayName = ''
             DisplayIcon = ''
             try:
                  key_name_list =_winreg.EnumKey(key, i)
                  each_key_path = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"+'\\'+key_name_list
                  each_key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, each_key_path, 0, _winreg.KEY_ALL_ACCESS)
                  DisplayName, REG_SZ = _winreg.QueryValueEx(each_key, "DisplayName")
                  DisplayName = DisplayName.encode('utf-8')
                  try:
                      DisplayIcon, REG_SZ = _winreg.QueryValueEx(each_key,"DisplayIcon")
                      DisplayIcon = DisplayIcon.encode('utf-8')
                  except WindowsError:
                      pass
                  #注册表中同时满足DisplayName 和 DisplayIcon
                  if DisplayName and DisplayIcon:
                      result = self.orderDict(str(i), DisplayName, DisplayIcon)
             except WindowsError:
                 pass

2.从exe中获取Icon资源

获取到了软件的列表，现在要把列表展示出来，肯定要查看软件的Icon了，所以要从已有的“DisplayIcon” 包含“exe”中读取exe的Icon
通过win32ui，win32gui 来获取exe中的Icon资源

 large, small = win32gui.ExtractIconEx(self.numreg[key]['exe'], 0)
 self.pixmap = QtGui.QPixmap.fromWinHBITMAP(self.bitmapFromHIcon(large[0]), 2)
 def bitmapFromHIcon(self, hIcon):
         hdc = win32ui.CreateDCFromHandle(win32gui.GetDC(0))
         hbmp = win32ui.CreateBitmap()
         hbmp.CreateCompatibleBitmap(hdc, 32, 32)
         hdc = hdc.CreateCompatibleDC()
         hdc.SelectObject(hbmp)
         hdc.DrawIcon((0, 0), hIcon)
         hdc.DeleteDC()
         return hbmp.GetHandle()

3.QListWidget的Icon模型，与获取item值

在QListWidget 中setViewMode 设置查看的模型中为IconMode  ，才可以指定显示的Icon

         self.contentsWidget = QtGui.QListWidget()
         self.contentsWidget.setViewMode(QtGui.QListView.IconMode)
         self.contentsWidget.setIconSize(QtCore.QSize(96, 84))  #Icon 大小
         self.contentsWidget.setMovement(QtGui.QListView.Static)  #Listview不让列表拖动
         self.contentsWidget.setMaximumWidth(800)  # 最大宽度
         self.contentsWidget.setSpacing(15)  # 间距大小

需要获取QListWidget中item。 首先要在定义QlistWidgetItem的时候setData 值

Atem=QtGui.QListWidgetItem(self.contentsWidget)
exeMenu=‘data_string’
Atem.setData(QtCore.Qt.UserRole, exeMenu)

获取：

item = self.contentsWidget.currentItem()
location = item.data(QtCore.Qt.UserRole)
Obj= location.toPyObject()
print(Obj)

4.打开exe文件或目录

打开文件和目录参考： http://www.cnblogs.com/dcb3688/p/4463670.html

        if Obj and os.path.exists(Obj):  #文件or 目录存在
            if os.path.isfile(Obj):
                import win32process
                try:
                    win32process.CreateProcess(str(Obj), '',None , None , 0 ,win32process. CREATE_NO_WINDOW , None , None ,win32process.STARTUPINFO())
                except Exception, e:
                    print(e)
            else:
                os.startfile(str(Obj))

        else:  # 不存在的目录
            QtGui.QMessageBox.warning(self, (u'提示'),(u'无法打开不存在的目录！'),QtGui.QMessageBox.Yes)

完整代码如下：

 # -*- coding: UTF8 -*-
 from PyQt4 import QtCore, QtGui
 import _winreg
 import re, sys, os, rcc
 import win32ui
 import win32gui
 reload(sys)
 sys.setdefaultencoding("utf-8")
 class ListDialog(QtGui.QDialog):
     def __init__(self, parent=None):
         super(ListDialog, self).__init__(parent)

         self.contentsWidget = QtGui.QListWidget()
         self.contentsWidget.setViewMode(QtGui.QListView.IconMode)
         self.contentsWidget.setIconSize(QtCore.QSize(96, 84))  #Icon 大小
         self.contentsWidget.setMovement(QtGui.QListView.Static)  #Listview不让列表拖动
         self.contentsWidget.setMaximumWidth(800)  # 最大宽度
         self.contentsWidget.setSpacing(15)  # 间距大小

         winrege= winregeditor()
         self.numreg=winrege.getreg()
         for key in self.numreg.keys():
             Atem=QtGui.QListWidgetItem(self.contentsWidget)
             try:  # ico 来自exe
                 large, small = win32gui.ExtractIconEx(self.numreg[key]['exe'], 0)
                 exeMenu=self.numreg[key]['exe']
                 win32gui.DestroyIcon(small[0])
                 self.pixmap = QtGui.QPixmap.fromWinHBITMAP(self.bitmapFromHIcon(large[0]), 2)
             except Exception,e:  #ico 来自 icon
                 if self.numreg[key].has_key('icon') and os.path.isfile(self.numreg[key]['icon']):  # 判断ico文件是否存在
                     self.pixmap = QtGui.QPixmap(self.numreg[key]['icon'])
                     iconMenu = self.numreg[key]['icon']
                     split = iconMenu.split('\\')
                     exeMenu ='\\'.join(split[:-1])
                 else:  # 不存在ico文件给定默认图标
                     self.pixmap = ':default.png'
                     exeMenu = ''

             Atem.setIcon(QtGui.QIcon(self.pixmap))
             Atem.setFlags(QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled)
             Atem.setTextAlignment(QtCore.Qt.AlignHCenter)
             Atem.setData(QtCore.Qt.UserRole, exeMenu)
             DisplayName=self.numreg[key]['DisplayName'].encode('utf-8')
             Atem.setToolTip(u""+DisplayName)  # tip 显示
             if len(DisplayName)>=6:
                 DisplayName=DisplayName.decode('utf8')[0:6].encode('utf8')+'…'
             Atem.setText(u""+DisplayName)

         horizontalLayout = QtGui.QHBoxLayout()
         horizontalLayout.addWidget(self.contentsWidget)
         mainLayout = QtGui.QVBoxLayout()
         mainLayout.addLayout(horizontalLayout)
         self.setLayout(mainLayout)
         self.setWindowTitle(u'Pyqt 显示已安装软件列表')
         self.setWindowIcon(QtGui.QIcon(':favicon.ico'))
         self.resize(600, 300)
         self.contentsWidget.itemDoubleClicked.connect(self.DoubleClicked)  #双击事件

     # 当窗体大小改变后重新绘制窗体   重新排列Icon效果
     def paintEvent(self,event):
         mw = self.geometry()
         width=mw.width()  # 获取窗体宽度
         self.contentsWidget.setViewMode(QtGui.QListView.IconMode)
         self.contentsWidget.setIconSize(QtCore.QSize(96, 84))  #Icon 大小
         self.contentsWidget.setMaximumWidth(width)
         self.contentsWidget.setSpacing(12)  # 间距大小
     # win32 获取exe 资源
     def bitmapFromHIcon(self, hIcon):
         hdc = win32ui.CreateDCFromHandle(win32gui.GetDC(0))
         hbmp = win32ui.CreateBitmap()
         hbmp.CreateCompatibleBitmap(hdc, 32, 32)
         hdc = hdc.CreateCompatibleDC()
         hdc.SelectObject(hbmp)
         hdc.DrawIcon((0, 0), hIcon)
         hdc.DeleteDC()
         return hbmp.GetHandle()
     # 双击事件
     def DoubleClicked(self):
         item = self.contentsWidget.currentItem()   # 获取当前item   <PyQt4.QtGui.QListWidgetItem object at 0x01775E40>
         location = item.data(QtCore.Qt.UserRole)    # 获取item里面的data  <PyQt4.QtCore.QVariant object at 0x018FD9B0>
         Obj= location.toPyObject()
         if Obj and os.path.exists(Obj):  #文件or 目录存在
             if os.path.isfile(Obj):
                 import win32process
                 try:
                     win32process.CreateProcess(str(Obj), '',None , None , 0 ,win32process. CREATE_NO_WINDOW , None , None ,win32process.STARTUPINFO())
                 except Exception, e:
                     print(e)
             else:
                 os.startfile(str(Obj))

         else:  # 不存在的目录
             QtGui.QMessageBox.warning(self, (u'提示'),(u'无法打开不存在的目录！'),QtGui.QMessageBox.Yes)

 # 注册表操作
 class winregeditor:
     dicList = {}

     def orderDict(self, numkey, DisplayName, DisplayIcon):
         self.dicList[numkey] = {'DisplayName': DisplayName, 'DisplayIcon': DisplayIcon}
         exeIcon = re.compile('.*exe')
         match = exeIcon.match(DisplayIcon)
         if match: #匹配到exe， 可直接打开
             self.dicList[numkey]['exe'] = match.group()
         else:  # 没有exe，Icon可为ico 文件
             self.dicList[numkey]['icon'] =DisplayIcon
         return self.dicList

     def getreg(self):
         key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", 0, _winreg.KEY_ALL_ACCESS)
         for i in xrange(0, _winreg.QueryInfoKey(key)[0]-1):
             DisplayName = ''
             DisplayIcon = ''
             try:
                  key_name_list =_winreg.EnumKey(key, i)
                  each_key_path = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"+'\\'+key_name_list
                  each_key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, each_key_path, 0, _winreg.KEY_ALL_ACCESS)
                  DisplayName, REG_SZ = _winreg.QueryValueEx(each_key, "DisplayName")
                  DisplayName = DisplayName.encode('utf-8')
                  try:
                      DisplayIcon, REG_SZ = _winreg.QueryValueEx(each_key,"DisplayIcon")
                      DisplayIcon = DisplayIcon.encode('utf-8')
                  except WindowsError:
                      pass
                  #注册表中同时满足DisplayName 和 DisplayIcon
                  if DisplayName and DisplayIcon:
                      result = self.orderDict(str(i), DisplayName, DisplayIcon)
             except WindowsError:
                 pass

         return result

 if __name__ == '__main__':
     app = QtGui.QApplication(sys.argv)
     dialog = ListDialog()
     dialog.show()
     sys.exit(app.exec_())

效果：

控制面板--软件删除：

QlistWidget软件列表效果：