From 1a191ce0ab1e3953bd6caca6be706c4844aa0ba3 Mon Sep 17 00:00:00 2001
From: RomanKurlygin <ksu23182002@mail.ru>
Date: Tue, 26 May 2026 07:16:03 +0000
Subject: [PATCH] add main.py

---
 main.py | 129 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 main.py

diff --git a/main.py b/main.py
new file mode 100644
index 0000000..ef65435
--- /dev/null
+++ b/main.py
@@ -0,0 +1,129 @@
+"""Практическое задание №3: память разговора + подтверждение вызовов инструментов."""
+from __future__ import annotations
+
+import os
+
+from dotenv import load_dotenv
+from langchain.agents import create_agent
+from langchain.tools import tool
+from langchain_openai import ChatOpenAI
+from langgraph.checkpoint.memory import MemorySaver
+from rich.console import Console
+
+load_dotenv()
+
+console = Console()
+
+llm = ChatOpenAI(
+    model=os.getenv("OPENAI_MODEL", "openai/gpt-oss-20b:free"),
+    base_url=os.getenv("OPENAI_BASE_URL", "https://openrouter.ai/api/v1"),
+    api_key=os.getenv("OPENAI_API_KEY", "fake"),
+    temperature=0.0,
+)
+
+
+@tool
+def get_price(city: str, date: str = "сегодня") -> str:
+    """Узнать примерную цену/стоимость покупок или погодные условия в городе на дату."""
+    return f"{city}, {date}: ориентировочно 150–300 руб. за базовую корзину."
+
+
+memory = MemorySaver()
+
+agent = create_agent(
+    model=llm,
+    tools=[get_price],
+    system_prompt="Ты помощник по планированию покупок и погоде. Помни контекст разговора.",
+    checkpointer=memory,
+    interrupt_before=["tools"],
+)
+
+
+def _print_pending_tool(config: dict) -> None:
+    state = agent.get_state(config)
+    messages = state.values.get("messages", [])
+    if not messages:
+        return
+    last = messages[-1]
+    tool_calls = getattr(last, "tool_calls", None) or []
+    if not tool_calls:
+        return
+    tc = tool_calls[0]
+    name = tc.get("name") if isinstance(tc, dict) else getattr(tc, "name", "?")
+    args = tc.get("args") if isinstance(tc, dict) else getattr(tc, "args", {})
+    console.print("\n --- --- --- ")
+    console.print(f"{name}({args})")
+    console.print(f"Агент хочет вызвать утилиту {name}({args})")
+
+
+def _print_updates(chunk_data: dict) -> None:
+    for node_name, update in chunk_data.items():
+        if node_name == "__interrupt__":
+            continue
+        if not isinstance(update, dict):
+            continue
+        messages = update.get("messages", [])
+        for msg in messages:
+            tool_calls = getattr(msg, "tool_calls", None) or []
+            for tc in tool_calls:
+                name = tc.get("name") if isinstance(tc, dict) else getattr(tc, "name", "?")
+                args = tc.get("args") if isinstance(tc, dict) else getattr(tc, "args", {})
+                console.print(f"\n --- --- --- ")
+                console.print(f"{name}({args})")
+
+
+def ask_and_run(user_input: dict | None, config: dict) -> None:
+    """Запуск или возобновление агента с обработкой паузы перед tools."""
+    for chunk in agent.stream(
+        user_input,
+        config=config,
+        stream_mode=["messages", "updates"],
+    ):
+        state = agent.get_state(config)
+
+        if not isinstance(chunk, tuple) or len(chunk) != 2:
+            continue
+
+        chunk_type, chunk_data = chunk
+
+        if chunk_type == "messages":
+            if isinstance(chunk_data, tuple) and len(chunk_data) >= 1:
+                token = chunk_data[0]
+                content = getattr(token, "content", None)
+                if content:
+                    console.print(content, end="")
+
+        if chunk_type == "updates" and isinstance(chunk_data, dict):
+            _print_updates(chunk_data)
+
+            if "__interrupt__" in chunk_data and state.next == ("tools",):
+                _print_pending_tool(config)
+                answer = input("Разрешить? (Y/n): ").strip().lower()
+                if answer in ("", "y", "yes", "д", "да"):
+                    ask_and_run(None, config)
+                else:
+                    console.print("Отменено")
+                return
+
+    console.print()
+
+
+def main() -> None:
+    config = {"configurable": {"thread_id": "разговор-1"}}
+    console.print(
+        "Чат с агентом (память + подтверждение tools). "
+        "Введите 'exit' для выхода.\n"
+    )
+
+    while True:
+        user_text = input("\nВы: ").strip()
+        if user_text.lower() == "exit":
+            break
+        if not user_text:
+            continue
+
+        ask_and_run({"messages": [{"role": "human", "content": user_text}]}, config)
+
+
+if __name__ == "__main__":
+    main()