From bd9d6e94674f7bef9553835c7bfa3b9ffd347f25 Mon Sep 17 00:00:00 2001
From: geekan <geekan@foxmail.com>
Date: Thu, 13 Jul 2023 00:42:53 +0800
Subject: [PATCH] remove langchain parser.

---
 metagpt/utils/common.py      | 33 ---------------------------------
 tests/metagpt/test_parser.py | 20 --------------------
 2 files changed, 53 deletions(-)
 delete mode 100644 tests/metagpt/test_parser.py

diff --git a/metagpt/utils/common.py b/metagpt/utils/common.py
index f74d2d8b7..739addc95 100644
--- a/metagpt/utils/common.py
+++ b/metagpt/utils/common.py
@@ -12,9 +12,6 @@ import re
 
 from typing import Union, List, Tuple
 from metagpt.logs import logger
-from langchain.schema import AgentAction, AgentFinish, OutputParserException
-
-FINAL_ANSWER_ACTION = "Final Answer:"
 
 
 def check_cmd_exists(command) -> int:
@@ -233,33 +230,3 @@ def print_members(module, indent=0):
             print(f'{prefix}Function: {name}')
         elif inspect.ismethod(obj):
             print(f'{prefix}Method: {name}')
-
-
-class BasicParser:
-    def parse(self, text: str) -> Union[AgentAction, AgentFinish]:
-        if FINAL_ANSWER_ACTION in text:
-            return AgentFinish(
-                {"output": text.split(FINAL_ANSWER_ACTION)[-1].strip()}, text
-            )
-        # \s matches against tab/newline/whitespace
-        regex = (
-            r"Action\s*\d*\s*:[\s]*(.*?)[\s]*Action\s*\d*\s*Input\s*\d*\s*:[\s]*(.*)"
-        )
-        match = re.search(regex, text, re.DOTALL)
-        if not match:
-            raise OutputParserException(f"Could not parse LLM output: `{text}`")
-        action = match.group(1).strip()
-        action_input = match.group(2)
-        return AgentAction(action, action_input.strip(" ").strip('"'), text)
-
-
-if __name__ == '__main__':
-    parser = BasicParser()
-    action_sample = "I need to calculate the 0.23 power of Elon Musk's current age.\nAction: Calculator\nAction Input: 49 raised to the 0.23 power"
-    final_answer_sample = "I now know the answer to the question.\nFinal Answer: 2.447626228522259"
-
-    rsp = parser.parse(action_sample)
-    logger.info(rsp)
-
-    rsp = parser.parse(final_answer_sample)
-    logger.info(rsp)
diff --git a/tests/metagpt/test_parser.py b/tests/metagpt/test_parser.py
deleted file mode 100644
index 001641a38..000000000
--- a/tests/metagpt/test_parser.py
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-"""
-@Time    : 2023/5/26 20:54
-@Author  : alexanderwu
-@File    : test_parser.py
-"""
-from langchain.schema import AgentAction, AgentFinish, OutputParserException
-from metagpt.parsers import BasicParser
-
-def test_basic_parser():
-    parser = BasicParser()
-    action_sample = "I need to calculate the 0.23 power of Elon Musk's current age.\nAction: Calculator\nAction Input: 49 raised to the 0.23 power"
-    final_answer_sample = "I now know the answer to the question.\nFinal Answer: 2.447626228522259"
-
-    rsp = parser.parse(action_sample)
-    assert isinstance(rsp, AgentAction)
-
-    rsp = parser.parse(final_answer_sample)
-    assert isinstance(rsp, AgentFinish)