class_docstr: Class for incrementally computing the variance of a series of numbers.
class_docstr_tok: ["Class","for","incrementally","computing","the","variance","of","a","series","of","numbers","."]
code: def value(self):
      if self.corrected_value is None:
          return None
      return self.corrected_value + 1e-16
  
imports: from abc import abstractmethod
  from typing import List
  from math import sqrt
  import numpy
label_desc: Use image node_id 6 for calling the Variance obj's underlying member method code with example usage: obj.value() and returns: unknown, None