update pyodide sandbox example (#30)

README.md

@@ -100,6 +100,7 @@ You can use any code sandbox you want, pass it in as a function which accepts tw
 
 > [!Warning]
 > Use a sandboxed environment in production! The `eval` function below is just for demonstration purposes, not safe!
+> See example of using a secure [LangChain Sandbox](https://github.com/langchain-ai/langchain-sandbox) [here](examples/pyodide_sandbox_example.py)
 
 ```py
 import builtins

examples/pyodide_sandbox_example.py

@@ -1,3 +1,4 @@
+# pip install langgraph-codeact "langchain[anthropic]"
 import asyncio
 import inspect
 from typing import Any
@@ -9,21 +10,13 @@ from langgraph.checkpoint.memory import MemorySaver
 from langgraph_codeact import EvalCoroutine, create_codeact
 
 
-def create_pyodide_eval_fn(
-    sandbox_dir: str = "./sessions", session_id: str | None = None
-) -> EvalCoroutine:
+def create_pyodide_eval_fn(sandbox: PyodideSandbox) -> EvalCoroutine:
     """Create an eval_fn that uses PyodideSandbox.
-
-    Args:
-        sandbox_dir: Directory to store session files
-        session_id: ID of the session to use
-
-    Returns:
-        A function that evaluates code using PyodideSandbox
     """
-    sandbox = PyodideSandbox(sandbox_dir, allow_net=True)
 
-    async def async_eval_fn(code: str, _locals: dict[str, Any]) -> tuple[str, dict[str, Any]]:
+    async def async_eval_fn(
+        code: str, _locals: dict[str, Any]
+    ) -> tuple[str, dict[str, Any]]:
         # Create a wrapper function that will execute the code and return locals
         wrapper_code = f"""
 def execute():
@@ -50,7 +43,6 @@ execute()
             # Execute the code and get the result
             response = await sandbox.execute(
                 code=context_setup + "\n\n" + wrapper_code,
-                session_id=session_id,
             )
 
             # Check if execution was successful
@@ -59,7 +51,9 @@ execute()
 
             # Get the output from stdout
             output = (
-                response.stdout if response.stdout else "<Code ran, no output printed to stdout>"
+                response.stdout
+                if response.stdout
+                else "<Code ran, no output printed to stdout>"
             )
             result = response.result
 
@@ -69,7 +63,9 @@ execute()
 
             # Get the new variables by comparing with original locals
             new_vars = {
-                k: v for k, v in result.items() if k not in _locals and not k.startswith("_")
+                k: v
+                for k, v in result.items()
+                if k not in _locals and not k.startswith("_")
             }
             return output, new_vars
 
@@ -154,7 +150,8 @@ tools = [
 
 model = init_chat_model("claude-3-7-sonnet-latest", model_provider="anthropic")
 
-eval_fn = create_pyodide_eval_fn()
+sandbox = PyodideSandbox(allow_net=True)
+eval_fn = create_pyodide_eval_fn(sandbox)
 code_act = create_codeact(model, tools, eval_fn)
 agent = code_act.compile(checkpointer=MemorySaver())
 

pyproject.toml

@@ -9,7 +9,7 @@ license = {text = "MIT"}
 readme = "README.md"
 requires-python = ">=3.10,<4.0"
 dependencies = [
-    "langgraph (>=0.3.5,<0.4.0)"
+    "langgraph>=0.4.5"
 ]
 
 [build-system]
@@ -20,7 +20,7 @@ build-backend = "pdm.backend"
 dev = [
     "langchain-anthropic>=0.3.9,<0.4.0",
     "langchain>=0.3.20,<0.4.0",
-    "langchain-sandbox>=0.0.3,<0.1.0"
+    "langchain-sandbox>=0.0.5,<0.1.0"
 ]
 test = [
     "pytest>=8.0.0",

uv.lock

@@ -432,7 +432,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "0.3.48"
+version = "0.3.60"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -443,18 +443,22 @@ dependencies = [
     { name = "tenacity" },
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/13/f3/7dffb16b9245d333d5af381dd3b0130a0d4c652c22e386d0819e773c90f3/langchain_core-0.3.48.tar.gz", hash = "sha256:be4b2fe36d8a11fb4b6b13e0808b12aea9f25e345624ffafe1d606afb6059f21", size = 534337 }
+sdist = { url = "https://files.pythonhosted.org/packages/5b/75/95129aaada92980a002a31e002610a80af3c8967ae7884710372e89cdde0/langchain_core-0.3.60.tar.gz", hash = "sha256:63dd1bdf7939816115399522661ca85a2f3686a61440f2f46ebd86d1b028595b", size = 557456 }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/2d/bc/344f5b11fdfe0e27f7064d2e829921a791461dc32e5ed285fe6325518c26/langchain_core-0.3.60-py3-none-any.whl", hash = "sha256:2ccdf06b12e699b1b0962bc02837056c075b4981c3d13f82a4d4c30bb22ea3dc", size = 437890 },
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 [[package]]
 name = "langchain-sandbox"
-version = "0.0.3"
+version = "0.0.5"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/5e/bd/31183b7c7d3f22ecbd0598bac764f2d5a79509aebfefc91b0f0a3b816357/langchain_sandbox-0.0.3.tar.gz", hash = "sha256:4736d5e5671bbf5ec93ee5c9b26ab1abc2b6859e75cea3b390de8948a8652a57", size = 22430 }
+dependencies = [
+    { name = "langchain-core" },
+    { name = "langgraph" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/c4/51/4b1a276d145b35653ffad06393d0b2f09d0cc74f103d6f9b71e47b477280/langchain_sandbox-0.0.5.tar.gz", hash = "sha256:3cad5a33033268238ac25e9499bc0ee7ed0500940601ff0629e2b75fb54d5ebd", size = 72853 }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/56/9a/bd80e7fbf43871e385d67965dc8f4ae71fb80259e5bcca2cfcb6b0000c19/langchain_sandbox-0.0.5-py3-none-any.whl", hash = "sha256:7117c6af9fec634582bc0784b418b2e2c54bf51a9accf000b565e09b49a8532d", size = 7298 },
 ]
 
 [[package]]
@@ -471,31 +475,32 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "0.3.20"
+version = "0.4.5"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
     { name = "langgraph-checkpoint" },
     { name = "langgraph-prebuilt" },
     { name = "langgraph-sdk" },
+    { name = "pydantic" },
     { name = "xxhash" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/40/4f/3026a775bf6bd03ace19bb25c1b91b0a77f46a71b4486bdb61e48aada0b4/langgraph-0.3.20.tar.gz", hash = "sha256:c980ec26aae3b52f4d75e7b852c22360c93c803e22297e85963c84bd53100020", size = 116501 }
+sdist = { url = "https://files.pythonhosted.org/packages/85/b6/eafa5f260e10e60c969def1cb26740aa9e57dc49dd1ea133ccbaaf09cf63/langgraph-0.4.5.tar.gz", hash = "sha256:08a8c6577b09cda4e0c16712e762927f00930dabbc7fe235562985ad85891349", size = 128672 }
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+    { url = "https://files.pythonhosted.org/packages/f2/2c/052922a444e32371f08eff4a8095e82cb74ed8a80823a9168079ce27211c/langgraph-0.4.5-py3-none-any.whl", hash = "sha256:73f36caae55137c2bdb2a6c59661f0ae29c1516a0d1f4ad4975ad3862865a979", size = 155297 },
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 [[package]]
 name = "langgraph-checkpoint"
-version = "2.0.23"
+version = "2.0.26"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
     { name = "ormsgpack" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/c5/61/e2518ac9216a4e9f4efda3ac61595e3c9e9ac00833141c9688e8d56bd7eb/langgraph_checkpoint-2.0.26.tar.gz", hash = "sha256:2b800195532d5efb079db9754f037281225ae175f7a395523f4bf41223cbc9d6", size = 37874 }
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+    { url = "https://files.pythonhosted.org/packages/38/48/d7cec540a3011b3207470bb07294a399e3b94b2e8a602e38cb007ce5bc10/langgraph_checkpoint-2.0.26-py3-none-any.whl", hash = "sha256:ad4907858ed320a208e14ac037e4b9244ec1cb5aa54570518166ae8b25752cec", size = 44247 },
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 [[package]]
@@ -521,13 +526,13 @@ test = [
 ]
 
 [package.metadata]
-requires-dist = [{ name = "langgraph", specifier = ">=0.3.5,<0.4.0" }]
+requires-dist = [{ name = "langgraph", specifier = ">=0.4.5" }]
 
 [package.metadata.requires-dev]
 dev = [
     { name = "langchain", specifier = ">=0.3.20,<0.4.0" },
     { name = "langchain-anthropic", specifier = ">=0.3.9,<0.4.0" },
-    { name = "langchain-sandbox", specifier = ">=0.0.3,<0.1.0" },
+    { name = "langchain-sandbox", specifier = ">=0.0.5,<0.1.0" },
 ]
 test = [
     { name = "mypy", specifier = ">=1.8.0" },
@@ -539,15 +544,15 @@ test = [
 
 [[package]]
 name = "langgraph-prebuilt"
-version = "0.1.7"
+version = "0.1.8"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
     { name = "langgraph-checkpoint" },
 ]
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 [[package]]