"NameError: name 'FilePath' is not defined" in calling create_schema_from_function #27226

MRYingLEE · 2024-10-09T12:18:17Z

Checked other resources

I added a very descriptive title to this issue.
I searched the LangChain documentation with the integrated search.
I used the GitHub search to find a similar question and didn't find it.
I am sure that this is a bug in LangChain rather than my code.
The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

The following code:

from langchain_core.tools.base import (
    create_schema_from_function as create_schema_from_function,
)
    
import pandas
func=pandas.read_csv
print(type(func))
print(func.__name__)
print(func.__qualname__)

model = create_schema_from_function(
    func_name,
    func,
    filter_args=(),
    parse_docstring=True,
    error_on_invalid_docstring=False,
    include_injected=False,
)

Error Message and Stack Trace (if applicable)

<class 'function'>
read_csv
read_csv

NameError Traceback (most recent call last)
Cell In[27], line 11
8 print(func.name)
9 print(func.qualname)
---> 11 model = create_schema_from_function(
12 func_name,
13 func,
14 filter_args=(),
15 parse_docstring=True,
16 error_on_invalid_docstring=False,
17 include_injected=False,
18 )

File /lib/python3.12/site-packages/langchain_core/tools/base.py:249, in create_schema_from_function(model_name, func, filter_args, parse_docstring, error_on_invalid_docstring, include_injected)
244 with warnings.catch_warnings():
245 # We are using deprecated functionality here.
246 # This code should be re-written to simply construct a pydantic model
247 # using inspect.signature and create_model.
248 warnings.simplefilter("ignore", category=PydanticDeprecationWarning)
--> 249 validated = validate_arguments(func, config=_SchemaConfig) # type: ignore
251 # Let's ignore self and cls arguments for class and instance methods
252 # If qualified name has a ".", then it likely belongs in a class namespace
253 in_class = bool(func.qualname and "." in func.qualname)

File /lib/python3.12/site-packages/pydantic/deprecated/decorator.py:64, in validate_arguments(func, config)
61 return wrapper_function
63 if func:
---> 64 return validate(func)
65 else:
66 return validate

File /lib/python3.12/site-packages/pydantic/deprecated/decorator.py:51, in validate_arguments..validate(_func)
50 def validate(_func: 'AnyCallable') -> 'AnyCallable':
---> 51 vd = ValidatedFunction(_func, config)
53 @wraps(_func)
54 def wrapper_function(*args: Any, **kwargs: Any) -> Any:
55 return vd.call(*args, **kwargs)

File /lib/python3.12/site-packages/pydantic/deprecated/decorator.py:94, in ValidatedFunction.init(self, function, config)
91 self.v_args_name = 'args'
92 self.v_kwargs_name = 'kwargs'
---> 94 type_hints = _typing_extra.get_type_hints(function, include_extras=True)
95 takes_args = False
96 takes_kwargs = False

File /lib/python312.zip/typing.py:2246, in get_type_hints(obj, globalns, localns, include_extras)
2238 if isinstance(value, str):
2239 # class-level forward refs were handled above, this must be either
2240 # a module-level annotation or a function argument annotation
2241 value = ForwardRef(
2242 value,
2243 is_argument=not isinstance(obj, types.ModuleType),
2244 is_class=False,
2245 )
-> 2246 hints[name] = _eval_type(value, globalns, localns)
2247 return hints if include_extras else {k: _strip_annotations(t) for k, t in hints.items()}

File /lib/python312.zip/typing.py:400, in _eval_type(t, globalns, localns, recursive_guard)
393 """Evaluate all forward references in the given type t.
394
395 For use of globalns and localns see the docstring for get_type_hints().
396 recursive_guard is used to prevent infinite recursion with a recursive
397 ForwardRef.
398 """
399 if isinstance(t, ForwardRef):
--> 400 return t._evaluate(globalns, localns, recursive_guard)
401 if isinstance(t, (_GenericAlias, GenericAlias, types.UnionType)):
402 if isinstance(t, GenericAlias):

File /lib/python312.zip/typing.py:907, in ForwardRef.evaluate(self, globalns, localns, recursive_guard)
902 if self.forward_module is not None:
903 globalns = getattr(
904 sys.modules.get(self.forward_module, None), 'dict', globalns
905 )
906 type = _type_check(
--> 907 eval(self.forward_code, globalns, localns),
908 "Forward references must evaluate to types.",
909 is_argument=self.forward_is_argument,
910 allow_special_forms=self.forward_is_class,
911 )
912 self.forward_value = eval_type(
913 type, globalns, localns, recursive_guard | {self.forward_arg}
914 )
915 self.forward_evaluated = True

File :1

NameError: name 'FilePath' is not defined