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/cli/langchain_cli/namespaces/migrate/generate/grit.py

@@ -0,0 +1,40 @@
+from typing import List, Tuple
+
+
+def split_package(package: str) -> Tuple[str, str]:
+    """Split a package name into the containing package and the final name"""
+    parts = package.split(".")
+    return ".".join(parts[:-1]), parts[-1]
+
+
+def dump_migrations_as_grit(name: str, migration_pairs: List[Tuple[str, str]]):
+    """Dump the migration pairs as a Grit file."""
+    output = "language python"
+    remapped = ",\n".join(
+        [
+            f"""
+            [
+                `{split_package(from_module)[0]}`,
+                `{split_package(from_module)[1]}`,
+                `{split_package(to_module)[0]}`,
+                `{split_package(to_module)[1]}`
+            ]
+            """
+            for from_module, to_module in migration_pairs
+        ]
+    )
+    pattern_name = f"langchain_migrate_{name}"
+    output = f"""
+language python
+
+// This migration is generated automatically - do not manually edit this file
+pattern {pattern_name}() {{
+  find_replace_imports(list=[
+{remapped}
+  ])
+}}
+
+// Add this for invoking directly
+{pattern_name}()
+"""
+    return output