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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 echo(self, variableName, verbose=False):
 """ The echo command will display the value of the variable specified by the variableName argument, or all variables if variableName is not provided. :param variableName: The name of the variable or '*' to display the value of all variables. :param verbose: print more """

        PARAMS={"variableName":variableName}
        response=api(url=self.__url+"/echo", PARAMS=PARAMS, verbose=verbose)
        return response