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

chapter2/kv-cache/tests/conftest.py

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+"""Pytest bootstrap for the kv-cache experiment tests."""
+
+from pathlib import Path
+import sys
+import types
+
+
+EXPERIMENT_ROOT = Path(__file__).resolve().parents[1]
+if str(EXPERIMENT_ROOT) not in sys.path:
+    sys.path.insert(0, str(EXPERIMENT_ROOT))
+
+try:
+    import openai  # noqa: F401
+except ImportError:
+    openai_stub = types.ModuleType("openai")
+    openai_stub.OpenAI = object
+    sys.modules.setdefault("openai", openai_stub)