How do I force a default value of key in dictionary when key is not
preset. For example, say I have list of dictionaries t
`key`delayed`assetMainType`assetSubType`cusip`1`2`3`4`6`7`8!("LPL";0b;"EQUITY";"ADR";"50186V102";9.03;9.4;9.25;1f;,"
";,"P";110...
