class_docstr: Non permanent document
  
  This document is meant for debugging purposes within the EphemeralDB.
  
  .. seealso:: :class:`orion.core.io.database.ephemeraldb.EphemeralDB` for database object.
class_docstr_tok: ["Non","permanent","document","This","document","is","meant","for","debugging","purposes","within","the","EphemeralDB",".","..","seealso",":",":",":","class",":","`","orion.core.io.database.ephemeraldb.EphemeralDB","`","for","database","object","."]
docstr: Get the item corresponding to the given key in the document
docstr_tok: ["Get","the","item","corresponding","to","the","given","key","in","the","document"]
code: def __getitem__(self, key):
      """Get the item corresponding to the given key in the document"""
      return self._data.get(key, None)
  
imports: import copy
  from collections import defaultdict
  from orion.core.io.database import Database, DatabaseError, DuplicateKeyError
  from orion.core.utils.flatten import flatten, unflatten
label_desc: Use image node_id 10 for calling the EphemeralDocument obj's underlying member method code with example usage: obj.__getitem__(key) and returns: self