Python 打包程序判断是否已经运行

代码如下：
 1 # -*- coding: UTF8 -*-
 2 from win32com.client import Dispatch
 3 import win32com
 4 import sys, os
 5 from PyQt4 import QtCore, QtGui
 6 
 7 class Logicpy(QtGui.QWidget):
 8     def __init__(self):
 9         super(Logicpy, self).__init__()
10         self.resize(100, 100)
11         mythis = os.path.basename(os.path.realpath(sys.argv[0]))   # 获得当前文件的名字
12         exist = self.proc_exist(mythis)
13         if exist:
14             Ok = QtGui.QMessageBox.question(self, (u'提示'),(u'已经运行'), QtGui.QMessageBox.Yes)
15             if Ok == QtGui.QMessageBox.Yes:
16                 exit()
17                 # QtCore.QCoreApplication.quit()
18                 # QtGui.qApp.quit  # 退出
19 
20     #判断该进程是否存在
21     def proc_exist(self, process_name):
22         is_exist = False
23         wmi = win32com.client.GetObject('winmgmts:')
24         processCodeCov = wmi.ExecQuery('select * from Win32_Process where name="%s"' %(process_name))
25         if len(processCodeCov) > 2:
26             is_exist = True
27         return is_exist
28 
29 
30 
31 if __name__ == "__main__":
32     app = QtGui.QApplication(sys.argv)
33     Logic = Logicpy()
34     Logic.show()
35     sys.exit(app.exec_())
效果：