python - NSUserNotification not working with wx.app.MainLoop() method -

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here simple code uses pyobjc interface show desktop notification. when call notify method without wx.app.mainloop() works fine wx.app.mainloop() not.

import foundation, objc  nsusernotification = objc.lookupclass('nsusernotification') nsusernotificationcenter = objc.lookupclass('nsusernotificationcenter')  def notify(title, subtitle, info_text, delay=0, sound=false, userinfo={}):    notification = nsusernotification.alloc().init()   notification.settitle_(title)   notification.setsubtitle_(subtitle)   notification.setinformativetext_(info_text)   notification.setuserinfo_(userinfo)   if sound:     notification.setsoundname_("nsusernotificationdefaultsoundname")    notification.setdeliverydate_(foundation.nsdate.datewithtimeinterval_sincedate_(delay, foundation.nsdate.date()))   nsusernotificationcenter.defaultusernotificationcenter().schedulenotification_(notification)   if __name__ == '__main__':     app = wx.app()     notify("notify tittle", "notify subtitle", "notify body")     app.mainloop()    # commenting line shows desktop notification


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