Untitled Document 1

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#yuan Navigation_Back:
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""" 
   @pyqtSignature("")
    def On_pushbutton_Back_clicked(self,checked):
        print "yyyyyyyyybackbackback"
    @pyqtSignature("")
    def On_actionBack_trigered(self):
        print "actionbackactionback"

        if history == 0:
            print "please choose a method first"
        return
        else:
        #read method from history
            locateMethod(self, name, index)
    
    
"""