old_contents: #!/usr/bin/env python3
  import statistics
  
  
  class estimatedtime:
      def __init__(self, numberofpoints):
          self.listoftimes = []
          self.points = numberofpoints
  
      def append(self, timeinseconds, inferprogress=True):
          # print(timeinseconds)
          self.listoftimes.append(timeinseconds)
          if inferprogress is True:
              self.points -= 1
  
      def ETA(self):
          return("{0:.5f}".format((statistics.mean(self.listoftimes) * self.points)))
  
new_contents: #!/usr/bin/env python3
  import statistics
  
  
  class ETC:
      ''' Estimated Time to Completion '''
      def __init__(self, numberofpoints):
          self.listoftimes = []
          self.points = numberofpoints + 1
  
      def append(self, timeinseconds, inferprogress=True):
          # print(timeinseconds)
          self.listoftimes.append(timeinseconds)
          if inferprogress is True:
              self.points -= 1
  
      def ETC(self):
          return("{0:.5f}".format((statistics.mean(self.listoftimes) * self.points)))
  
subject: Change estimated time class to ETC