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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 closeConnection(self):
 """close current serial port connection"""

        print '%s call closeConnection' % self.port
        try:
            if self.handle:
                self.handle.close()
                self.handle = None
        except Exception, e:
            ModuleHelper.WriteIntoDebugLogger("closeConnection() Error: " + str(e))