Issue: DeprecationWarning (due to use of Pydantic v1 and Python 3.13.x)

[mjakl]

Issue you'd like to raise.

When running pytest with the LangSmith plugin (and probably also with LangChain in the production code), I get the following deprecation warning:

.venv/lib/python3.13/site-packages/pydantic/v1/typing.py:68
.venv/lib/python3.13/site-packages/pydantic/v1/typing.py:68
.venv/lib/python3.13/site-packages/pydantic/v1/typing.py:68
.venv/lib/python3.13/site-packages/pydantic/v1/typing.py:68
.venv/lib/python3.13/site-packages/pydantic/v1/typing.py:68
.venv/lib/python3.13/site-packages/pydantic/v1/typing.py:68
.venv/lib/python3.13/site-packages/pydantic/v1/typing.py:68
  .........venv/lib/python3.13/site-packages/pydantic/v1/typing.py:68: DeprecationWarning: Failing to pass a value to the 'type_params' parameter of 'typing.ForwardRef._evaluate' is deprecated, as it leads to incorrect behaviour when calling typing.ForwardRef._evaluate on a stringified annotation that references a PEP 695 type parameter. It will be disallowed in Python 3.15.
    return cast(Any, type_)._evaluate(globalns, localns, recursive_guard=set())

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html

When I set PYTHONWARNINGS=error I get this stack trace pointing to schema.py using Pydantic v1:

Traceback (most recent call last):
  File ".......venv/bin/pytest", line 8, in <module>
    sys.exit(console_main())
             ~~~~~~~~~~~~^^
  File ".......venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 201, in console_main
    code = main()
  File ".......venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 156, in main
    config = _prepareconfig(args, plugins)
  File ".......venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 341, in _prepareconfig
    config = pluginmanager.hook.pytest_cmdline_parse(
        pluginmanager=pluginmanager, args=args
    )
  File ".......venv/lib/python3.13/site-packages/pluggy/_hooks.py", line 513, in __call__
    return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
           ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/pluggy/_manager.py", line 120, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
           ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/pluggy/_callers.py", line 139, in _multicall
    raise exception.with_traceback(exception.__traceback__)
  File ".......venv/lib/python3.13/site-packages/pluggy/_callers.py", line 122, in _multicall
    teardown.throw(exception)  # type: ignore[union-attr]
    ~~~~~~~~~~~~~~^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/_pytest/helpconfig.py", line 105, in pytest_cmdline_parse
    config = yield
             ^^^^^
  File ".......venv/lib/python3.13/site-packages/pluggy/_callers.py", line 103, in _multicall
    res = hook_impl.function(*args)
  File ".......venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 1140, in pytest_cmdline_parse
    self.parse(args)
    ~~~~~~~~~~^^^^^^
  File ".......venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 1494, in parse
    self._preparse(args, addopts=addopts)
    ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/_pytest/config/__init__.py", line 1381, in _preparse
    self.pluginmanager.load_setuptools_entrypoints("pytest11")
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/pluggy/_manager.py", line 421, in load_setuptools_entrypoints
    plugin = ep.load()
  File "/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/importlib/metadata/__init__.py", line 179, in load
    module = import_module(match.group('module'))
  File "/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File ".......venv/lib/python3.13/site-packages/_pytest/assertion/rewrite.py", line 184, in exec_module
    exec(co, module.__dict__)
    ~~~~^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/langsmith/pytest_plugin.py", line 12, in <module>
    from langsmith import utils as ls_utils
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File ".......venv/lib/python3.13/site-packages/_pytest/assertion/rewrite.py", line 184, in exec_module
    exec(co, module.__dict__)
    ~~~~^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/langsmith/utils.py", line 43, in <module>
    from langsmith import schemas as ls_schemas
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File ".......venv/lib/python3.13/site-packages/_pytest/assertion/rewrite.py", line 184, in exec_module
    exec(co, module.__dict__)
    ~~~~^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/langsmith/schemas.py", line 139, in <module>
    class Example(ExampleBase):
    ...<39 lines>...
            return f"{self.__class__}(id={self.id}, dataset_id={self.dataset_id}, link='{self.url}')"
  File ".......venv/lib/python3.13/site-packages/pydantic/v1/main.py", line 286, in __new__
    cls.__try_update_forward_refs__()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File ".......venv/lib/python3.13/site-packages/pydantic/v1/main.py", line 807, in __try_update_forward_refs__
    update_model_forward_refs(cls, cls.__fields__.values(), cls.__config__.json_encoders, localns, (NameError,))
    ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/pydantic/v1/typing.py", line 559, in update_model_forward_refs
    update_field_forward_refs(f, globalns=globalns, localns=localns)
    ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/pydantic/v1/typing.py", line 525, in update_field_forward_refs
    field.type_ = evaluate_forwardref(field.type_, globalns, localns or None)
                  ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".......venv/lib/python3.13/site-packages/pydantic/v1/typing.py", line 68, in evaluate_forwardref
    return cast(Any, type_)._evaluate(globalns, localns, recursive_guard=set())
           ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/typing.py", line 1049, in _evaluate
    _deprecation_warning_for_no_type_params_passed("typing.ForwardRef._evaluate")
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/typing.py", line 451, in _deprecation_warning_for_no_type_params_passed
    warnings.warn(depr_message, category=DeprecationWarning, stacklevel=3)
    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
DeprecationWarning: Failing to pass a value to the 'type_params' parameter of 'typing.ForwardRef._evaluate' is deprecated, as it leads to incorrect behaviour when calling typing.ForwardRef._evaluate on a stringified annotation that references a PEP 695 type parameter. It will be disallowed in Python 3.15.

This is LangSmith 0.3.0, but I also had the warning with LangSmith 0.2.x

Suggestion:

No response