ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter7/model-action-threshold/tasks/cache_contract/repo/cachelib/__init__.py

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+from cachelib.cache import Cache
+
+__all__ = ["Cache"]

chapter7/model-action-threshold/tasks/cache_contract/repo/cachelib/cache.py

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+class Cache:
+    def __init__(self):
+        self._values = {}
+
+    def get(self, key, default=None):
+        return self._values.get(key, default)
+
+    def put(self, key, value):
+        self._values[key] = value
+
+    def get_or_load(self, key, loader):
+        cached = self.get(key)
+        if cached is not None:
+            return cached
+        value = loader(key)
+        self.put(key, value)
+        return value

chapter7/model-action-threshold/tasks/cache_contract/repo/cachelib/catalog.py

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+class Catalog:
+    def __init__(self, cache, fetch_product):
+        self.cache = cache
+        self.fetch_product = fetch_product
+
+    def product(self, product_id):
+        return self.cache.get_or_load(product_id, self.fetch_product)