class_docstr: Missing Data Value
class_docstr_tok: ["Missing","Data","Value"]
docstr: add information of missing value for data fields to the report
  
  Args:
      missing_count (dict):
          - key: data field name
          - value: the count or the percentage of missing value in the field
      total_count (dict, Optinal):
          - key: data field name
          - value: the count of missing value in the field
      ratio (bool): True if `missing_value` is the percentage
      notes (str, Optional): explain the block
code: def __init__(
      self,
      missing_count: dict,
      total_count: dict,
      ratio=False,
      notes=None,
  ) -> None:
      """
      add information of missing value for data fields to the report
  
      Args:
          missing_count (dict):
              - key: data field name
              - value: the count or the percentage of missing value in the field
          total_count (dict, Optinal):
              - key: data field name
              - value: the count of missing value in the field
          ratio (bool): True if `missing_value` is the percentage
          notes (str, Optional): explain the block
      """
      super(DataMissingValue, self).__init__(
          missing_count, total_count, ratio, notes
      )
      self._missing_count = missing_count
      self._total_count = total_count
      self._ratio = ratio
      if not (notes is None):
          self._notes = notes
      else:
          self._notes = "This section shows the percentage of sample data with missing values."
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from typing import Tuple, Dict
  from xai.data import explorer
  from xai.formatter.contents.base import Content
  from xai.formatter.writer.base import Writer
label_desc: Use image node_id 1 to create a new DataMissingValue object from inherited base classes: Content with example: obj = DataMissingValue(missing_count, total_count, ratio, notes)