new_contents: import string
  
  def pysenMMean (x, y):
          ymf = []
          total = 0
          for i in range(0, len(y)-1):
                  total += y[i]
                  ymf.append(total/(i+1))
          mf = 0
          xf = 0
          for i in range(0, len(y)-1):
                  if ymf[i] > mf:
                          mf = ymf[i]
                          xf = i
          ymb = []
          total = 0
          for i in range(0, len(y)-1):
                  ii = len(y)-1-i
                  total += y[ii]
                  ymb.append(total/(i+1))
          mb = 0
          xb = 0
          for i in range(0, len(y)-1):
                  if ymb[i] > mb:
                          mb = ymb[i]
                          xb = i
          xb = len(y)-1 - xb
          return [x[xb], x[xf]]
  
  # print "mmean %s" % pysenMMean(x , y)
  
subject: add @franpantano function for peaks