Upgrade dependencies (#287)

* Replace langchain with langchain-core as a requirement.
* Update all the imports using output of langchain-cli migrate command.

docs/source/apis.ipynb

@@ -42,8 +42,8 @@
    },
    "outputs": [],
    "source": [
-    "from langchain.chat_models import ChatOpenAI\n",
-    "from kor import create_extraction_chain, Object, Text, Number"
+    "from kor import create_extraction_chain, Object, Text, Number\n",
+    "from langchain_openai import ChatOpenAI"
    ]
   },
   {

docs/source/document_extraction.ipynb

@@ -96,9 +96,9 @@
     "from pydantic import BaseModel, Field, validator\n",
     "from kor import extract_from_documents, from_pydantic, create_extraction_chain\n",
     "from kor.documents.html import MarkdownifyHTMLProcessor\n",
-    "from langchain.chat_models import ChatOpenAI\n",
-    "from langchain.schema import Document\n",
-    "from langchain.text_splitter import RecursiveCharacterTextSplitter"
+    "from langchain_core.documents import Document\n",
+    "from langchain_text_splitters import RecursiveCharacterTextSplitter\n",
+    "from langchain_openai import ChatOpenAI"
    ]
   },
   {
@@ -458,7 +458,7 @@
    },
    "outputs": [],
    "source": [
-    "from langchain.callbacks import get_openai_callback"
+    "from langchain_community.callbacks import get_openai_callback"
    ]
   },
   {

docs/source/nested_objects.ipynb

@@ -43,8 +43,7 @@
    "source": [
     "from kor.extraction import create_extraction_chain\n",
     "from kor.nodes import Object, Text, Number\n",
-    "from langchain.chat_models import ChatOpenAI\n",
-    "from langchain.llms import OpenAI"
+    "from langchain_openai import ChatOpenAI, OpenAI"
    ]
   },
   {

docs/source/objects.ipynb

@@ -41,8 +41,7 @@
    "source": [
     "from kor.extraction import create_extraction_chain\n",
     "from kor.nodes import Object, Text, Number\n",
-    "from langchain.chat_models import ChatOpenAI\n",
-    "from langchain.llms import OpenAI"
+    "from langchain_openai import ChatOpenAI, OpenAI"
    ]
   },
   {

docs/source/prompt.ipynb

@@ -42,8 +42,8 @@
    "source": [
     "from kor.extraction import create_extraction_chain\n",
     "from kor.nodes import Object, Text, Number\n",
-    "from langchain.chat_models import ChatOpenAI\n",
-    "from langchain.prompts import PromptTemplate"
+    "from langchain_core.prompts import PromptTemplate\n",
+    "from langchain_openai import ChatOpenAI"
    ]
   },
   {

docs/source/schema_serialization.ipynb

@@ -200,7 +200,7 @@
    "outputs": [],
    "source": [
     "from kor.extraction import create_extraction_chain\n",
-    "from langchain.chat_models import ChatOpenAI"
+    "from langchain_openai import ChatOpenAI"
    ]
   },
   {

docs/source/tutorial.ipynb

@@ -48,7 +48,7 @@
    "source": [
     "from kor.extraction import create_extraction_chain\n",
     "from kor.nodes import Object, Text, Number\n",
-    "from langchain.chat_models import ChatOpenAI"
+    "from langchain_openai import ChatOpenAI"
    ]
   },
   {
@@ -123,7 +123,7 @@
    },
    "outputs": [],
    "source": [
-    "from langchain.llms import OpenAI"
+    "from langchain_openai import OpenAI"
    ]
   },
   {

docs/source/untyped_objects.ipynb

@@ -41,8 +41,7 @@
    "source": [
     "from kor.extraction import create_extraction_chain\n",
     "from kor.nodes import Object, Text, Number\n",
-    "from langchain.chat_models import ChatOpenAI\n",
-    "from langchain.llms import OpenAI"
+    "from langchain_openai import ChatOpenAI, OpenAI"
    ]
   },
   {

docs/source/validation.ipynb

@@ -44,13 +44,13 @@
    "outputs": [],
    "source": [
     "import enum\n",
-    "from langchain.chat_models import ChatOpenAI\n",
     "from kor import create_extraction_chain, Object, Text, Number\n",
     "import pydantic\n",
     "from typing import List\n",
     "from kor import from_pydantic\n",
     "from pydantic import BaseModel, Field\n",
-    "from typing import Optional"
+    "from typing import Optional\n",
+    "from langchain_openai import ChatOpenAI"
    ]
   },
   {

kor/documents/html.py

@@ -3,7 +3,7 @@
 import re
 from typing import Tuple
 
-from langchain.schema import Document
+from langchain_core.documents import Document
 
 from kor.documents.typedefs import AbstractDocumentProcessor
 

kor/documents/typedefs.py

@@ -1,6 +1,6 @@
 import abc
 
-from langchain.schema import Document
+from langchain_core.documents import Document
 
 
 class AbstractDocumentProcessor(abc.ABC):

kor/extraction/api.py

@@ -3,17 +3,12 @@
 from typing import Any, Callable, List, Optional, Sequence, Type, Union, cast
 
 from langchain.chains import LLMChain
-from langchain.docstore.document import Document
-from langchain.prompts import PromptTemplate
-
-from kor.extraction.parser import KorParser
-
-try:  # Handle breaking change in langchain
-    from langchain.base_language import BaseLanguageModel
-except ImportError:
-    from langchain.schema import BaseLanguageModel  # type: ignore
+from langchain_core.documents import Document
+from langchain_core.language_models import BaseLanguageModel
+from langchain_core.prompts import PromptTemplate
 
 from kor.encoders import Encoder, InputFormatter, initialize_encoder
+from kor.extraction.parser import KorParser
 from kor.extraction.typedefs import DocumentExtraction, Extraction
 from kor.nodes import Object
 from kor.prompts import create_langchain_prompt

kor/extraction/parser.py

@@ -2,6 +2,7 @@
 
 from typing import List, Optional
 
+from langchain_core.output_parsers import BaseOutputParser
 from pydantic import Extra
 
 from kor.encoders import Encoder
@@ -10,11 +11,6 @@
 from kor.nodes import Object
 from kor.validators import Validator
 
-try:
-    from langchain.output_parsers.base import BaseOutputParser
-except ImportError:
-    from langchain.schema import BaseOutputParser  # type: ignore
-
 
 class KorParser(BaseOutputParser):
     """A Kor langchain parser integration.

kor/prompts.py

@@ -3,14 +3,9 @@
 
 from typing import Any, List, Optional, Tuple
 
-from langchain.prompts import BasePromptTemplate, PromptTemplate
-from langchain.schema import (
-    AIMessage,
-    BaseMessage,
-    HumanMessage,
-    PromptValue,
-    SystemMessage,
-)
+from langchain_core.messages import AIMessage, BaseMessage, HumanMessage, SystemMessage
+from langchain_core.prompt_values import PromptValue
+from langchain_core.prompts import BasePromptTemplate, PromptTemplate
 
 from kor.encoders import Encoder
 from kor.encoders.encode import InputFormatter, encode_examples, format_text