Fix #11737 issue (extra_tools option of create_pandas_dataframe_agent is not working) (#13203)

- **Description:** Fix #11737 issue (extra_tools option of
create_pandas_dataframe_agent is not working),
  - **Issue:** #11737 ,
  - **Dependencies:** no,
- **Tag maintainer:** @baskaryan, @eyurtsev, @hwchase17 I needed this
method at work, so I modified it myself and used it. There is a similar
issue(#11737) and PR(#13018) of @PyroGenesis, so I combined my code at
the original PR.
You may be busy, but it would be great help for me if you checked. Thank
you.
  - **Twitter handle:** @lunara_x 

If you need an .ipynb example about this, please tag me. 
I will share what I am working on after removing any work-related
content.

---------

Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>

libs/experimental/langchain_experimental/agents/agent_toolkits/pandas/base.py

@@ -33,7 +33,8 @@ def _get_multi_prompt(
     input_variables: Optional[List[str]] = None,
     include_df_in_prompt: Optional[bool] = True,
     number_of_head_rows: int = 5,
-) -> Tuple[BasePromptTemplate, List[PythonAstREPLTool]]:
+    extra_tools: Sequence[BaseTool] = (),
+) -> Tuple[BasePromptTemplate, List[BaseTool]]:
     num_dfs = len(dfs)
     if suffix is not None:
         suffix_to_use = suffix
@@ -55,12 +56,13 @@ def _get_multi_prompt(
     df_locals = {}
     for i, dataframe in enumerate(dfs):
         df_locals[f"df{i + 1}"] = dataframe
-    tools = [PythonAstREPLTool(locals=df_locals)]
+    tools = [PythonAstREPLTool(locals=df_locals)] + list(extra_tools)
-
     prompt = ZeroShotAgent.create_prompt(
-        tools, prefix=prefix, suffix=suffix_to_use, input_variables=input_variables
+        tools,
+        prefix=prefix,
+        suffix=suffix_to_use,
+        input_variables=input_variables,
     )
-
     partial_prompt = prompt.partial()
     if "dfs_head" in input_variables:
         dfs_head = "\n\n".join([d.head(number_of_head_rows).to_markdown() for d in dfs])
@@ -77,7 +79,8 @@ def _get_single_prompt(
     input_variables: Optional[List[str]] = None,
     include_df_in_prompt: Optional[bool] = True,
     number_of_head_rows: int = 5,
-) -> Tuple[BasePromptTemplate, List[PythonAstREPLTool]]:
+    extra_tools: Sequence[BaseTool] = (),
+) -> Tuple[BasePromptTemplate, List[BaseTool]]:
     if suffix is not None:
         suffix_to_use = suffix
         include_df_head = True
@@ -96,10 +99,13 @@ def _get_single_prompt(
     if prefix is None:
         prefix = PREFIX
 
-    tools = [PythonAstREPLTool(locals={"df": df})]
+    tools = [PythonAstREPLTool(locals={"df": df})] + list(extra_tools)
 
     prompt = ZeroShotAgent.create_prompt(
-        tools, prefix=prefix, suffix=suffix_to_use, input_variables=input_variables
+        tools,
+        prefix=prefix,
+        suffix=suffix_to_use,
+        input_variables=input_variables,
     )
 
     partial_prompt = prompt.partial()
@@ -117,7 +123,8 @@ def _get_prompt_and_tools(
     input_variables: Optional[List[str]] = None,
     include_df_in_prompt: Optional[bool] = True,
     number_of_head_rows: int = 5,
-) -> Tuple[BasePromptTemplate, List[PythonAstREPLTool]]:
+    extra_tools: Sequence[BaseTool] = (),
+) -> Tuple[BasePromptTemplate, List[BaseTool]]:
     try:
         import pandas as pd
 
@@ -141,6 +148,7 @@ def _get_prompt_and_tools(
             input_variables=input_variables,
             include_df_in_prompt=include_df_in_prompt,
             number_of_head_rows=number_of_head_rows,
+            extra_tools=extra_tools,
         )
     else:
         if not isinstance(df, pd.DataFrame):
@@ -152,6 +160,7 @@ def _get_prompt_and_tools(
             input_variables=input_variables,
             include_df_in_prompt=include_df_in_prompt,
             number_of_head_rows=number_of_head_rows,
+            extra_tools=extra_tools,
         )
 
 
@@ -287,6 +296,7 @@ def create_pandas_dataframe_agent(
 ) -> AgentExecutor:
     """Construct a pandas agent from an LLM and dataframe."""
     agent: BaseSingleActionAgent
+    base_tools: Sequence[BaseTool]
     if agent_type == AgentType.ZERO_SHOT_REACT_DESCRIPTION:
         prompt, base_tools = _get_prompt_and_tools(
             df,
@@ -295,8 +305,9 @@ def create_pandas_dataframe_agent(
             input_variables=input_variables,
             include_df_in_prompt=include_df_in_prompt,
             number_of_head_rows=number_of_head_rows,
+            extra_tools=extra_tools,
         )
-        tools = base_tools + list(extra_tools)
+        tools = base_tools
         llm_chain = LLMChain(
             llm=llm,
             prompt=prompt,
@@ -318,7 +329,7 @@ def create_pandas_dataframe_agent(
             include_df_in_prompt=include_df_in_prompt,
             number_of_head_rows=number_of_head_rows,
         )
-        tools = base_tools + list(extra_tools)
+        tools = list(base_tools) + list(extra_tools)
         agent = OpenAIFunctionsAgent(
             llm=llm,
             prompt=_prompt,