class_docstr: Mergeable states for batch update in an aggregate function.
class_docstr_tok: ["Mergeable","states","for","batch","update","in","an","aggregate","function","."]
code: def __iadd__(self, other: "MeanState"):
      self.total += other.total
      self.count += other.count
      return self
  
imports: from collections.abc import Iterable, Sequence
  import dataclasses
  import enum
  import itertools
  from typing import Any
  import numpy
  from numpy import typing
  from tensorflow_model_analysis.experimental.lazytf import api
label_desc: Use image node_id 1 for calling the MeanState obj's underlying member method code with example usage: obj.__iadd__(other) and returns: self