code: def MakeUniformPmf(low, high, n):
      
      pmf = Pmf()
      for x in numpy.linspace(low, high, n):
          pmf.Set(x, 1)
      pmf.Normalize()
      return pmf
docs: Make a uniform Pmf.
  
      low: lowest value (inclusive)
      high: highest value (inclusize)
      n: number of values