code: def trimult(U, x, uplo='U', transa='N', alpha=1., inplace=False):
      
      if inplace:
          b = x
      else:
          b = x.copy('F')
      dtrmm_wrap(a=U, b=b, uplo=uplo, transa=transa, alpha=alpha)
      return b
docs: b = trimult(U,x, uplo='U')
  
  
      Multiplies U x, where U is upper triangular if uplo='U'
      or lower triangular if uplo = 'L'.