From ae7116432592bec54de1217bb620e370c3f7c9da Mon Sep 17 00:00:00 2001
From: Guangya Liu <gyliu@ibm.com>
Date: Wed, 11 Sep 2024 17:11:44 -0400
Subject: [PATCH] react (#202)

---
 react/react1.py | 107 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 react/react1.py

diff --git a/react/react1.py b/react/react1.py
new file mode 100644
index 0000000..cbd0943
--- /dev/null
+++ b/react/react1.py
@@ -0,0 +1,107 @@
+# This code is Apache 2 licensed:
+# https://www.apache.org/licenses/LICENSE-2.0
+
+from dotenv import load_dotenv
+load_dotenv()
+
+from openai import OpenAI
+import re
+import httpx
+
+class ChatBot:
+    def __init__(self, system=""):
+        self.client = OpenAI()
+        self.system = system
+        self.messages = []
+        if self.system:
+            self.messages.append({"role": "system", "content": system})
+    
+    def __call__(self, message):
+        self.messages.append({"role": "user", "content": message})
+        result = self.execute()
+        self.messages.append({"role": "assistant", "content": result})
+        return result
+    
+    def execute(self):
+        completion = self.client.chat.completions.create(model="gpt-3.5-turbo", messages=self.messages)
+        # Uncomment this to print out token usage each time, e.g.
+        # {"completion_tokens": 86, "prompt_tokens": 26, "total_tokens": 112}
+        # print(completion.usage)
+        return completion.choices[0].message.content
+
+prompt = """
+You run in a loop of Thought, Action, PAUSE, Observation.
+At the end of the loop you output an Answer
+Use Thought to describe your thoughts about the question you have been asked.
+Use Action to run one of the actions available to you - then return PAUSE.
+Observation will be the result of running those actions.
+
+Your available actions are:
+
+calculate:
+e.g. calculate: 4 * 7 / 3
+Runs a calculation and returns the number - uses Python so be sure to use floating point syntax if necessary
+
+wikipedia:
+e.g. wikipedia: LLM
+Returns a summary from searching Wikipedia
+
+Example session:
+
+Question: What is the capital of Hebei?
+Thought: I should look up Hebei on Wikipedia
+Action: wikipedia: Hebei
+PAUSE
+
+You will be called again with this:
+
+Observation: Hebei is a province in China. The capital is Shijiazhuang.
+
+You then output:
+
+Answer: The capital of Hebei is Shijiazhuang
+""".strip()
+
+
+action_re = re.compile('^Action: (\w+): (.*)$')
+
+def query(question, max_turns=5):
+    i = 0
+    bot = ChatBot(prompt)
+    next_prompt = question
+    while i < max_turns:
+        i += 1
+        result = bot(next_prompt)
+        print(result)
+        actions = [action_re.match(a) for a in result.split('\n') if action_re.match(a)]
+        if actions:
+            # There is an action to run
+            action, action_input = actions[0].groups()
+            if action not in known_actions:
+                raise Exception("Unknown action: {}: {}".format(action, action_input))
+            print(" -- running {} {}".format(action, action_input))
+            observation = known_actions[action](action_input)
+            print("Observation:", observation)
+            next_prompt = "Observation: {}".format(observation)
+        else:
+            return
+
+
+def wikipedia(q):
+    return httpx.get("https://en.wikipedia.org/w/api.php", params={
+        "action": "query",
+        "list": "search",
+        "srsearch": q,
+        "format": "json"
+    }).json()["query"]["search"][0]["snippet"]
+
+
+def calculate(what):
+    return eval(what)
+
+known_actions = {
+    "wikipedia": wikipedia,
+    "calculate": calculate,
+}
+
+query("What is the captical of Hebei")
\ No newline at end of file