Python datedelta расщепление

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Hi..  

I am completely new to python..  I have two dates rangestart = 20170605 and rangeend = 20170916.. I want to divide it into :
20170605-20170630
20170701-20170731
20170801-20170831
20180901-20170916
 want two list of dictionary containing {20170605,20170701,20170801,20170901}
Second {20170630,20170731,20170831,20170916} note that time is in timedelta 20170801and some more integers representing time.  Please help m.  Really struggling hard

Что я уже пробовал:

Поиск месяцев между датами хранение в списке n выполнение цикла for

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