Python 打包程序判断是否已经运行

代码如下：

 # -*- coding: UTF8 -*-
 from win32com.client import Dispatch
 import win32com
 import sys, os
 from PyQt4 import QtCore, QtGui

 class Logicpy(QtGui.QWidget):
     def __init__(self):
         super(Logicpy, self).__init__()
         self.resize(100, 100)
         mythis = os.path.basename(os.path.realpath(sys.argv[0]))   # 获得当前文件的名字
         exist = self.proc_exist(mythis)
         if exist:
             Ok = QtGui.QMessageBox.question(self, (u'提示'),(u'已经运行'), QtGui.QMessageBox.Yes)
             if Ok == QtGui.QMessageBox.Yes:
                 exit()
                 # QtCore.QCoreApplication.quit()
                 # QtGui.qApp.quit  # 退出

     #判断该进程是否存在
     def proc_exist(self, process_name):
         is_exist = False
         wmi = win32com.client.GetObject('winmgmts:')
         processCodeCov = wmi.ExecQuery('select * from Win32_Process where name=\"%s\"' %(process_name))
         if len(processCodeCov) > 2:
             is_exist = True
         return is_exist

 if __name__ == "__main__":
     app = QtGui.QApplication(sys.argv)
     Logic = Logicpy()
     Logic.show()
     sys.exit(app.exec_())

效果：