new_contents: import math
  
  
  def AIC(L, k):
      return 2*k - 2 * math.log(L)
  
  
  def AICc(L, k, n):
      return AIC(L, k) + 2*k*(k+1.)/(n-k-1.)
  
  
  def BIC(L, k, n):
      return -2 * math.log(L) + k * (math.log(n) - math.log(2*math.pi))
  
  
subject: add missing file.