One of @Tishka17 tasks. Maybe it's wrong

cached_client.py

import time
from dataclasses import dataclass
from typing import List


@dataclass
class Item:
    id: int
    name: str


class SomeClient:
    def get_object(self, item_id) -> Item:
        time.sleep(1)
        return Item(item_id, "name")

    def list_objects(self) -> List[Item]:
        time.sleep(1)
        return [Item(i, "name") for i in range(10)]

    def put_object(self, item: Item) -> None:
        time.sleep(1)

class CachedClient:
    def __init__(self, client):
        self.client = client
        self.cache = {}
    
    def get_object(self, item_id) -> Item:
        if self.cache.get(item_id):
            return self.cache[item_id]
        obj = self.client.get_object(item_id)
        self.cache[item_id] = obj
        return obj

    def list_objects(self) -> List[Item]:
        if self.cache.get('lst'):
            return self.cache['lst']
        lst = self.client.list_objects()
        self.cache['lst'] = lst
        return lst
    
    def put_object(self, item: Item) -> None:
        self.cache[item.id] = Item

c = SomeClient()
cached_c = CachedClient(c)
print(cached_c.get_object(4)) # Slowly
print(cached_c.get_object(4)) # Fast
print("_______________________")
print(cached_c.list_objects()) # Slowly
print(cached_c.list_objects()) # Fast
print("_______________________")
cached_c.put_object(Item(id=42, name='bob'))
print(cached_c.cache)