text: # The MIT License (MIT)
  # Copyright © 2021 Yuma Rao
  
  # Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
  # documentation files (the “Software”), to deal in the Software without restriction, including without limitation 
  # the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, 
  # and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
  
  # The above copyright notice and this permission notice shall be included in all copies or substantial portions of 
  # the Software.
  
  # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
  # THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
  # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 
  # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
  # DEALINGS IN THE SOFTWARE.
  
  import time
  
  # A moving average that updates values based on time since last update.
  class timed_rolling_avg():
      def __init__(self, initial_value, alpha):
          self.value = initial_value
          self.alpha = alpha
          self.last_update = time.time()
  
      def update(self, new_value):
          now = time.time()
          time_delta = now - self.last_update
          self.last_update = now
          new_value = new_value / time_delta
          self.value = (1 - self.alpha) * self.value + self.alpha * new_value