定期的にリークしてそうなオブジェクトを殺すマン．別スレッドでインスタンス作ってqueueに積む実装にするとなお良さそう

leak_killer.py

import threading
import contextlib


class LeakObject:
    
    def __init__(self, lifetime: int, cls: object, **kwargs):
        self._counter = 0
        self.lifetime = lifetime
        self._kwargs = kwargs
        self._cls = cls
        self._obj = cls(**kwargs)
        self._lock = threading.Lock()
    
    
    @contextlib.contextmanager
    def instance(self):
        with self._lock:
            self._counter += 1
            
        yield self._obj
        
        if self._counter > self.lifetime:
            with self._lock:
                self._counter = 0
                self._obj = self._cls(**self._kwargs)

                
class A():
    def __init__(self):
        print('generated')
        self.dat = []
        
    def append(self):
        self.dat.append(1)
        
    def hello(self):
        return 'hello'
    
    
l = LeakObject(8, A)

with l.instance() as a:
    a.append()
    print(a.dat)