structure saas with tools

.venv/lib/python3.10/site-packages/google/adk/agents/loop_agent.py

@@ -0,0 +1,62 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Loop agent implementation."""
+
+from __future__ import annotations
+
+from typing import AsyncGenerator
+from typing import Optional
+
+from typing_extensions import override
+
+from ..agents.invocation_context import InvocationContext
+from ..events.event import Event
+from .base_agent import BaseAgent
+
+
+class LoopAgent(BaseAgent):
+  """A shell agent that run its sub-agents in a loop.
+
+  When sub-agent generates an event with escalate or max_iterations are
+  reached, the loop agent will stop.
+  """
+
+  max_iterations: Optional[int] = None
+  """The maximum number of iterations to run the loop agent.
+
+  If not set, the loop agent will run indefinitely until a sub-agent
+  escalates.
+  """
+
+  @override
+  async def _run_async_impl(
+      self, ctx: InvocationContext
+  ) -> AsyncGenerator[Event, None]:
+    times_looped = 0
+    while not self.max_iterations or times_looped < self.max_iterations:
+      for sub_agent in self.sub_agents:
+        async for event in sub_agent.run_async(ctx):
+          yield event
+          if event.actions.escalate:
+            return
+      times_looped += 1
+    return
+
+  @override
+  async def _run_live_impl(
+      self, ctx: InvocationContext
+  ) -> AsyncGenerator[Event, None]:
+    raise NotImplementedError('The behavior for run_live is not defined yet.')
+    yield  # AsyncGenerator requires having at least one yield statement