docs(nav): 阅读路径导航 + 数字统一

src/py_srv/test/test_srv.py

@@ -30,7 +30,7 @@ def test_service_inproc_roundtrip(ros_context):
     req.a = 7
     req.b = 35
 
-    future = client.client.call_async(req)
+    future = client._client.call_async(req)
     end = time.time() + 3.0
     while not future.done() and time.time() < end:
         exec_.spin_once(timeout_sec=0.05)