code: def _command_list(self):
          
          cmd = [self.params.binary, 
                  "-f", str(self.params.f), 
                  "-T", str(self.params.T), 
                  "-m", str(self.params.m),
                  "-N", str(self.params.N),
                  "-x", str(self.params.x),
                  "-p", str(self.params.p),
                  "-n", str(self.params.n),
                  "-w", str(self.params.w),
                  "-s", str(self.params.s),
                 ]
          ## add ougroups
          if self.params.o:
              cmd += ["-o"]
              cmd += [",".join(self.params.o)]
          return cmd
docs: build the command list