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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def delete_changed(self, settings, key, user_data):
 """If the gconf var compat_delete be changed, this method will be called and will change the binding configuration in all terminals open. """

        for i in self.guake.notebook_manager.iter_terminals():
            i.set_delete_binding(self.getEraseBinding(settings.get_string(key)))