From e4459e423bcd85b1fc55e7872fe2149b90a1694f Mon Sep 17 00:00:00 2001
From: Nuno Campos <nuno@boringbits.io>
Date: Wed, 5 Jul 2023 19:53:56 +0100
Subject: [PATCH] Mark some output parsers as serializable (cross-checked w/
 JS) (#7083)

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---
 langchain/output_parsers/combining.py | 4 ++++
 langchain/output_parsers/fix.py       | 4 ++++
 langchain/output_parsers/list.py      | 4 ++++
 langchain/output_parsers/regex.py     | 4 ++++
 4 files changed, 16 insertions(+)

diff --git a/langchain/output_parsers/combining.py b/langchain/output_parsers/combining.py
index 9a100c143f8..fc24f018fba 100644
--- a/langchain/output_parsers/combining.py
+++ b/langchain/output_parsers/combining.py
@@ -10,6 +10,10 @@ from langchain.schema import BaseOutputParser
 class CombiningOutputParser(BaseOutputParser):
     """Class to combine multiple output parsers into one."""
 
+    @property
+    def lc_serializable(self) -> bool:
+        return True
+
     parsers: List[BaseOutputParser]
 
     @root_validator()
diff --git a/langchain/output_parsers/fix.py b/langchain/output_parsers/fix.py
index 602ff828905..416f88bb001 100644
--- a/langchain/output_parsers/fix.py
+++ b/langchain/output_parsers/fix.py
@@ -13,6 +13,10 @@ T = TypeVar("T")
 class OutputFixingParser(BaseOutputParser[T]):
     """Wraps a parser and tries to fix parsing errors."""
 
+    @property
+    def lc_serializable(self) -> bool:
+        return True
+
     parser: BaseOutputParser[T]
     retry_chain: LLMChain
 
diff --git a/langchain/output_parsers/list.py b/langchain/output_parsers/list.py
index 1cf2d39f573..108d0af6877 100644
--- a/langchain/output_parsers/list.py
+++ b/langchain/output_parsers/list.py
@@ -21,6 +21,10 @@ class ListOutputParser(BaseOutputParser):
 class CommaSeparatedListOutputParser(ListOutputParser):
     """Parse out comma separated lists."""
 
+    @property
+    def lc_serializable(self) -> bool:
+        return True
+
     def get_format_instructions(self) -> str:
         return (
             "Your response should be a list of comma separated values, "
diff --git a/langchain/output_parsers/regex.py b/langchain/output_parsers/regex.py
index c7760cbf23a..8245be202e6 100644
--- a/langchain/output_parsers/regex.py
+++ b/langchain/output_parsers/regex.py
@@ -9,6 +9,10 @@ from langchain.schema import BaseOutputParser
 class RegexParser(BaseOutputParser):
     """Class to parse the output into a dictionary."""
 
+    @property
+    def lc_serializable(self) -> bool:
+        return True
+
     regex: str
     output_keys: List[str]
     default_output_key: Optional[str] = None