docs: def dinfflowdir(np, filleddem, flowangle, slope, workingdir=None, mpiexedir=None, exedir=None,
                      log_file=None, runtime_file=None, hostfile=None):
          """Run Dinf flow direction"""
          fname = TauDEM.func_name('dinfflowdir')
          return TauDEM.run(FileClass.get_executable_fullpath(fname, exedir),
                            {'-fel': filleddem}, workingdir,
                            None,
                            {'-ang': flowangle, '-slp': slope},
                            {'mpipath': mpiexedir, 'hostfile': hostfile, 'n': np},
                            {'logfile': log_file, 'runtimefile': runtime_file})