Memorizer

Memorizer.py

class DataBuffer:
    """ Observer pattern """
    def __init__(self):
        self.memory = None

    def remember(self, memory):
        self.memory = memory
        
    def recall(self):
        out = self.memory
        self.memory = None
        return out


class Work:
    def __init__(self, mem):
        self.mem = mem
    def test(self):
        self.mem.remember('from Work')

class WorkX:
    def __init__(self, mem):
        self.mem = mem
    def test(self):
        print(self.mem.recall())

MX = DataBuffer()

wk = Work(MX)
wkx = WorkX(MX)
wk.test()
wkx.test()
wkx.test()
wk.test()
wkx.test()