multiple: pydantic 2 compatibility, v0.3 (#26443)

Signed-off-by: ChengZi <chen.zhang@zilliz.com>
Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>
Co-authored-by: Dan O'Donovan <dan.odonovan@gmail.com>
Co-authored-by: Tom Daniel Grande <tomdgrande@gmail.com>
Co-authored-by: Grande <Tom.Daniel.Grande@statsbygg.no>
Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: ccurme <chester.curme@gmail.com>
Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>
Co-authored-by: Tomaz Bratanic <bratanic.tomaz@gmail.com>
Co-authored-by: ZhangShenao <15201440436@163.com>
Co-authored-by: Friso H. Kingma <fhkingma@gmail.com>
Co-authored-by: ChengZi <chen.zhang@zilliz.com>
Co-authored-by: Nuno Campos <nuno@langchain.dev>
Co-authored-by: Morgante Pell <morgantep@google.com>

libs/community/langchain_community/utilities/semanticscholar.py

@@ -1,9 +1,9 @@
 """Utils for interacting with the Semantic Scholar API."""
 
 import logging
-from typing import Any, Dict, Optional
+from typing import Any, Dict, List, Optional
 
-from langchain_core.pydantic_v1 import BaseModel, root_validator
+from pydantic import BaseModel, model_validator
 
 logger = logging.getLogger(__name__)
 
@@ -39,7 +39,7 @@ class SemanticScholarAPIWrapper(BaseModel):
     S2_MAX_QUERY_LENGTH: int = 300
     load_max_docs: int = 100
     doc_content_chars_max: Optional[int] = 4000
-    returned_fields = [
+    returned_fields: List[str] = [
         "title",
         "abstract",
         "venue",
@@ -51,8 +51,9 @@ class SemanticScholarAPIWrapper(BaseModel):
         "externalIds",
     ]
 
-    @root_validator(pre=True)
-    def validate_environment(cls, values: Dict) -> Dict:
+    @model_validator(mode="before")
+    @classmethod
+    def validate_environment(cls, values: Dict) -> Any:
         """Validate that the python package exists in environment."""
         try:
             from semanticscholar import SemanticScholar