Изменение экземпляра через DICT изменяет все экземпляры

class Myclass:
	SOME_ARRAY = []
    def __init__(self):
      self.SOME_ARRAY2 = []
    
#SOME_ARRAY has the same adress across all instances of the class.
#SOME_ARRAY2 has a specific adress for each instance
Elegant Eel