From dadf302baf0c0b965a7089fcffbe33a1741c9c24 Mon Sep 17 00:00:00 2001
From: William Fu-Hinthorn <13333726+hinthornw@users.noreply.github.com>
Date: Wed, 12 Jul 2023 18:29:23 -0700
Subject: [PATCH] to prompt template, incomplete

---
 langchain/prompts/chat.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/langchain/prompts/chat.py b/langchain/prompts/chat.py
index 0264b8596bc..b234b61f3ca 100644
--- a/langchain/prompts/chat.py
+++ b/langchain/prompts/chat.py
@@ -252,3 +252,9 @@ class ChatPromptTemplate(BaseChatPromptTemplate, ABC):
 
     def save(self, file_path: Union[Path, str]) -> None:
         raise NotImplementedError
+
+    def to_prompt_template(self) -> PromptTemplate:
+        """Return a PromptTemplate with all input variables replaced with {var}."""
+        return PromptTemplate.from_template(
+            self.format(**{var: f"{{{var}}}" for var in self.input_variables})
+        )