Merge branch 'master' into fix/azureml-serverless-api-http400-bug

.github/DISCUSSION_TEMPLATE/q-a.yml

@@ -96,22 +96,27 @@ body:
   - type: textarea
     id: system-info
     attributes:
+      label: System Info
       description: |
-        Please share your system info with us. Do NOT skip this step and please don't trim
+        Please share your system info with us. 
-        the output. Most users don't include enough information here and it makes it harder
-        for us to help you.
         
-        Run the following command in your terminal and paste the output here:
+        "pip freeze | grep langchain" 
+        platform (windows / linux / mac)
+        python version
+        
+        OR if you're on a recent version of langchain-core you can paste the output of:
         
         python -m langchain_core.sys_info
-        
-        or if you have an existing python interpreter running:
-        
-        from langchain_core import sys_info
-        sys_info.print_sys_info()
-        
-        alternatively, put the entire output of `pip freeze` here.
       placeholder: |
+        "pip freeze | grep langchain"
+        platform
+        python version
+        
+        Alternatively, if you're on a recent version of langchain-core you can paste the output of:
+        
         python -m langchain_core.sys_info
+        
+        These will only surface LangChain packages, don't forget to include any other relevant
+        packages you're using (if you're not sure what's relevant, you can paste the entire output of `pip freeze`).
     validations:
       required: true

libs/core/langchain_core/load/load.py

@@ -19,6 +19,17 @@ DEFAULT_NAMESPACES = [
     "langchain_anthropic",
     "langchain_groq",
     "langchain_google_genai",
+    "langchain_aws",
+    "langchain_openai",
+    "langchain_google_vertexai",
+    "langchain_mistralai",
+    "langchain_fireworks",
+]
+# Namespaces for which only deserializing via the SERIALIZABLE_MAPPING is allowed.
+# Load by path is not allowed.
+DISALLOW_LOAD_FROM_PATH = [
+    "langchain_community",
+    "langchain",
 ]
 
 ALL_SERIALIZABLE_MAPPINGS = {
@@ -103,39 +114,30 @@ class Reviver:
             and value.get("id", None) is not None
         ):
             [*namespace, name] = value["id"]
+            mapping_key = tuple(value["id"])
 
             if namespace[0] not in self.valid_namespaces:
                 raise ValueError(f"Invalid namespace: {value}")
-
+            # The root namespace ["langchain"] is not a valid identifier.
-            # The root namespace "langchain" is not a valid identifier.
+            elif namespace == ["langchain"]:
-            if len(namespace) == 1 and namespace[0] == "langchain":
                 raise ValueError(f"Invalid namespace: {value}")
-
+            # Has explicit import path.
-            # If namespace is in known namespaces, try to use mapping
+            elif mapping_key in self.import_mappings:
-            key = tuple(namespace + [name])
+                import_path = self.import_mappings[mapping_key]
-            if namespace[0] in DEFAULT_NAMESPACES:
+                # Split into module and name
-                # Get the importable path
+                import_dir, name = import_path[:-1], import_path[-1]
-                if key not in self.import_mappings:
+                # Import module
+                mod = importlib.import_module(".".join(import_dir))
+            elif namespace[0] in DISALLOW_LOAD_FROM_PATH:
                 raise ValueError(
                     "Trying to deserialize something that cannot "
                     "be deserialized in current version of langchain-core: "
-                        f"{key}"
+                    f"{mapping_key}."
                 )
-                import_path = self.import_mappings[key]
+            # Otherwise, treat namespace as path.
-                # Split into module and name
-                import_dir, import_obj = import_path[:-1], import_path[-1]
-                # Import module
-                mod = importlib.import_module(".".join(import_dir))
-                # Import class
-                cls = getattr(mod, import_obj)
-            # Otherwise, load by path
-            else:
-                if key in self.additional_import_mappings:
-                    import_path = self.import_mappings[key]
-                    mod = importlib.import_module(".".join(import_path[:-1]))
-                    name = import_path[-1]
             else:
                 mod = importlib.import_module(".".join(namespace))
+
             cls = getattr(mod, name)
 
             # The class must be a subclass of Serializable.

libs/core/langchain_core/load/mapping.py

@@ -1026,4 +1026,24 @@ _JS_SERIALIZABLE_MAPPING: dict[tuple[str, ...], tuple[str, ...]] = {
         "image",
         "ImagePromptTemplate",
     ),
+    ("langchain", "chat_models", "bedrock", "ChatBedrock"): (
+        "langchain_aws",
+        "chat_models",
+        "ChatBedrock",
+    ),
+    ("langchain", "chat_models", "google_genai", "ChatGoogleGenerativeAI"): (
+        "langchain_google_genai",
+        "chat_models",
+        "ChatGoogleGenerativeAI",
+    ),
+    ("langchain", "chat_models", "groq", "ChatGroq"): (
+        "langchain_groq",
+        "chat_models",
+        "ChatGroq",
+    ),
+    ("langchain", "chat_models", "bedrock", "BedrockChat"): (
+        "langchain_aws",
+        "chat_models",
+        "ChatBedrock",
+    ),
 }

libs/core/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "langchain-core"
-version = "0.3.1"
+version = "0.3.2"
 description = "Building applications with LLMs through composability"
 authors = []
 license = "MIT"
@@ -18,6 +18,9 @@ disallow_untyped_defs = "True"
 module = [ "numpy", "pytest",]
 ignore_missing_imports = true
 
+[tool.ruff]
+target-version = "py39"
+
 [tool.poetry.urls]
 "Source Code" = "https://github.com/langchain-ai/langchain/tree/master/libs/core"
 "Release Notes" = "https://github.com/langchain-ai/langchain/releases?q=tag%3A%22langchain-core%3D%3D0%22&expanded=true"
@@ -40,20 +43,9 @@ python = ">=3.12.4"
 
 [tool.poetry.extras]
 
-[tool.ruff]
-target-version = "py39"
-
 [tool.ruff.lint]
-select = ["B", "E", "F", "I", "N", "T201", "UP"]
+select = [ "B", "E", "F", "I", "N", "T201", "UP",]
-ignore = ["UP007"]
+ignore = [ "UP007",]
-
-[tool.ruff.lint.pep8-naming]
-classmethod-decorators = [
-    "classmethod",
-    "langchain_core.utils.pydantic.pre_init",
-    "pydantic.field_validator",
-    "pydantic.v1.root_validator",
-]
 
 [tool.coverage.run]
 omit = [ "tests/*",]
@@ -79,6 +71,9 @@ optional = true
 [tool.poetry.group.test_integration]
 optional = true
 
+[tool.ruff.lint.pep8-naming]
+classmethod-decorators = [ "classmethod", "langchain_core.utils.pydantic.pre_init", "pydantic.field_validator", "pydantic.v1.root_validator",]
+
 [tool.ruff.lint.per-file-ignores]
 "tests/unit_tests/prompts/test_chat.py" = [ "E501",]
 "tests/unit_tests/runnables/test_runnable.py" = [ "E501",]