code: def __init__(
      self,
      alpha=None,
      adjust=None,
      alpha_ignore_na=None,
      validate_columns=None,
      **kw,
  ):
      super().__init__(
          _alpha=alpha,
          _adjust=adjust,
          _alpha_ignore_na=alpha_ignore_na,
          _validate_columns=validate_columns,
          **kw,
      )
  
imports: from collections import namedtuple
  import numpy
  import pandas
  from ....None import opcodes
  from ....serialization.serializables import BoolField, Float64Field
  from ..aggregation import BaseDataFrameExpandingAgg
label_desc: Use image node_id 1 to create a new DataFrameEwmAgg object from inherited base classes: BaseDataFrameExpandingAgg with example: obj = DataFrameEwmAgg(alpha, adjust, alpha_ignore_na, validate_columns)