import os

error_message = 'runnig the script error'
s = 'mshta "javascript:var sh=new ActiveXObject( 'WScript.Shell' ); sh.Popup( '' + error_message +'', 10, 'Library Book Reissue', 64 );close()"'
filehandle = open("c:\sc.bat","w")
filehandle.write(s)
filehandle.close()
os.system('c:\sc.bat')