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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 get_cmd_line(self):
 """ Return the full command line that will be used when this node is run by DAGman. """


    cmd = ""
    cmd_list = self.get_cmd_tuple_list()
    for argument in cmd_list:
      cmd += ' '.join(argument) + " "

    return cmd