Обновление Python до начала словаря

#In Python 3.8 ordered dictionaries were added, but they didn't add any functions to deal with this; .update() only adds to the end!
FinishedDict = {Key2 : Value2, Key1 : Value1}
BackDict = {Key3 : Value3}
BackDict.update(FinishedDict)
FinishedDict=BackDict
Najey Rifai