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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 commandlineargs(self):
 """Obtain a string of all parameters, using the paramater flags they were defined with, in order to pass to an external command. This is shell-safe by definition."""

        commandlineargs = []
        for parametergroup, parameters in self.parameters: #pylint: disable=unused-variable
            for parameter in parameters:
                p = parameter.compilearg()
                if p:
                    commandlineargs.append(p)
        return " ".join(commandlineargs)