| from collections import OrderedDict | |
| # Initialize LRU Cache | |
| class LRUCache: | |
| def __init__(self, max_size=20): | |
| self.max_size = max_size | |
| self.cache = OrderedDict() | |
| def get(self, key): | |
| if key in self.cache: | |
| self.cache.move_to_end(key) | |
| return self.cache[key] | |
| return None | |
| def set(self, key, value): | |
| if key in self.cache: | |
| self.cache.move_to_end(key) | |
| else: | |
| if len(self.cache) >= self.max_size: | |
| self.cache.popitem(last=False) | |
| self.cache[key] = value | |
| def delete(self, key): | |
| if key in self.cache: | |
| del self.cache[key] | |