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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 enable_evb(self):
 """Function to enable EVB on the interface. """

        if self.is_ncb:
            self.run_lldptool(["-T", "-i", self.port_name, "-g", "ncb",
                               "-V", "evb", "enableTx=yes"])
            ret = self.enable_gpid()
            return ret
        else:
            LOG.error("EVB cannot be set on NB")
            return False