Certain parser types not available

[ENUMERA8OR]

The following code:

from langchain.output_parsers import PydanticOutputParser, YamlOutputParser,OutputFixingParser, RetryOutputParser, BaseOutputParser

from langchain_core.output_parsers import BaseOutputParser, BaseGenerationOutputParser, YamlOutputParser

Yaml Output parser is not available in langchain: langchain_core.output_parsers package & Base Output parser is not there in langchain.output_parsers.

Using google colab notebook with the following other packages & environment variables:

%pip install -qU langchain-openai %pip install -U langsmith %pip install "unstructured[md]" !pip install -qU langchain-community !pip install wikipedia !pip install langchain_groq !rm .langchain.db %pip install bs4

import time import os import tiktoken import openai import json

from langchain.globals import set_llm_cache from langchain_openai import OpenAI from langchain_core.pydantic_v1 import BaseModel, Field from langchain_openai import ChatOpenAI from langchain.agents import AgentExecutor, create_tool_calling_agent, load_tools from langchain_core.prompts import ChatPromptTemplate from langchain.callbacks.manager import get_openai_callback from typing import List from langchain_core.messages import BaseMessage, ToolMessage from langchain_core.language_models import BaseChatModel, SimpleChatModel from langchain_core.messages import AIMessageChunk, BaseMessage, HumanMessage from langchain_core.outputs import ChatGeneration, ChatGenerationChunk,ChatResult, Generation from langchain_core.runnables import run_in_executor from langsmith.wrappers import wrap_openai from langsmith import traceable from langsmith import Client from langsmith.evaluation import evaluate from langchain_groq import ChatGroq from langchain_core.pydantic_v1 import BaseModel, Field from langchain_core.tools import tool from langchain_core.rate_limiters import InMemoryRateLimiter from langchain_core.messages import AIMessage, HumanMessage, ToolMessage from langchain_core.prompts import ChatPromptTemplate from langchain_core.runnables import RunnablePassthrough, RunnableLambda, RunnableParallel, RunnableGenerator from langchain_community.llms.llamafile import Llamafile from langchain_core.messages import ( AIMessage, HumanMessage, SystemMessage, trim_messages, filter_messages, merge_message_runs, ) from langchain_core.chat_history import InMemoryChatMessageHistory from langchain_core.runnables.history import RunnableWithMessageHistory from langchain_community.cache import SQLiteCache from typing import Any, Dict, Iterator, List, Mapping, Optional, Iterable from langchain_core.callbacks.manager import CallbackManagerForLLMRun from langchain_core.language_models.llms import LLM from langchain_core.outputs import GenerationChunk from langchain_core.prompts import ChatPromptTemplate from langchain_core.prompts import PromptTemplate from langchain_core.pydantic_v1 import BaseModel, Field, validator from langchain.output_parsers.json import SimpleJsonOutputParser from langchain_core.exceptions import OutputParserException from langchain_community.document_loaders import UnstructuredHTMLLoader, BSHTMLLoader,UnstructuredMarkdownLoader from langchain_core.documents import Document from pathlib import Path from pprint import pprint from langchain_community.document_loaders import JSONLoader

& environment variables:

os.environ["GROQ_API_KEY"] = "**"

os.environ["LANGCHAIN_TRACING_V2"] = "true"

os.environ["LANGCHAIN_API_KEY"] = "**"

os.environ["TAVILY_API_KEY"] = "***"

os.environ["OPENAI_API_KEY"] = "*****"

[gbaian10]

Is there a URL for the document?

[keenborder786]

@ENUMERA8OR their is no YamlOutputParser in Langchain.

[ENUMERA8OR]

There is but its in a different package aslo named langchain.

[dosubot[bot]]

Hi, @ENUMERA8OR. I'm Dosu, and I'm helping the LangChain team manage their backlog. I'm marking this issue as stale.

Issue Summary:

• You reported missing parser types like YamlOutputParser and BaseOutputParser in the expected langchain and langchain_core packages.
• User keenborder786 noted that YamlOutputParser does not exist in LangChain.
• You mentioned that YamlOutputParser is available in a different package also named langchain, indicating possible confusion between similarly named packages.

Next Steps:

• Please confirm if this issue is still relevant with the latest version of the LangChain repository. If so, you can keep the discussion open by commenting here.
• If there is no further activity, this issue will be automatically closed in 7 days.

Thank you for your understanding and contribution!

[ENUMERA8OR]

It is still relevant.

[dosubot[bot]]

@eyurtsev, the user @ENUMERA8OR has confirmed that the issue regarding the missing parser types like YamlOutputParser and BaseOutputParser is still relevant. Could you please assist them with this?