Class MockApi

tutorials/18_design_patterns_for_agents.py:300–304

    # ---- 演示: 同一个 Runtime, 不同的 "插头" ----

    class MockApi(ApiClient):
        def __init__(self, responses):
            self.responses = iter(responses)
        def stream(self, messages):
            return next(self.responses)

    class PrintToolExecutor(ToolExecutor):
        def execute(self, name, inp):