class_docstr: dict-like wrapper for the nested dictionaries in a SummarySubDict.
  
  Triggers self._root._callback on property changes.
class_docstr_tok: ["dict-like","wrapper","for","the","nested","dictionaries","in","a","SummarySubDict",".","Triggers","self._root._callback","on","property","changes","."]
code: def __delattr__(self, key):
      record = SummaryRecord()
      item = SummaryItem()
      item.key = (key,)
      record.remove = (item,)
      self._update(record)
  
imports: import abc
  import typing
  from .interface.summary_record import SummaryItem, SummaryRecord
label_desc: Use image node_id 7 for calling the SummaryDict obj's underlying member method code with example usage: obj.__delattr__(key) without return types