class_docstr: Class for incrementally computing the exponential moving average of a series of numbers.
class_docstr_tok: ["Class","for","incrementally","computing","the","exponential","moving","average","of","a","series","of","numbers","."]
code: def _add_first(self, x):
      if self.value is None:
          self.value = x
      else:
          self._add(x)
  
imports: from abc import abstractmethod
  from typing import List
  from math import sqrt
  import numpy
label_desc: Use image node_id 5 for calling the ExponentialMovingAverage obj's underlying member method code with example usage: obj._add_first(x) without return types