UnstructuredHTMLLoader fail when given Path type document

[Marsman1996]

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

from pathlib import Path
from langchain_community.document_loaders import UnstructuredHTMLLoader

document = Path("./test.html")
loader = UnstructuredHTMLLoader(document, mode="elements", strategy="fast")
loader.load()

Error Message and Stack Trace (if applicable)

Traceback (most recent call last):
  File "/home/Marsman1996/afgen/test/./hello.py", line 6, in <module>
    loader.load()
    ~~~~~~~~~~~^^
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/langchain_core/document_loaders/base.py", line 31, in load
    return list(self.lazy_load())
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/langchain_community/document_loaders/unstructured.py", line 107, in lazy_load
    elements = self._get_elements()
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/langchain_community/document_loaders/html.py", line 33, in _get_elements
    return partition_html(filename=self.file_path, **self.unstructured_kwargs)  # type: ignore[arg-type]
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/unstructured/partition/common/metadata.py", line 162, in wrapper
    elements = func(*args, **kwargs)
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/unstructured/chunking/dispatch.py", line 74, in wrapper
    elements = func(*args, **kwargs)
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/unstructured/partition/html/partition.py", line 91, in partition_html
    return list(_HtmlPartitioner.iter_elements(opts))
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/unstructured/partition/html/partition.py", line 189, in iter_elements
    yield from cls(opts)._iter_elements()
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/unstructured/partition/html/partition.py", line 203, in _iter_elements
    e.metadata.last_modified = self._opts.last_modified
                               ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/unstructured/utils.py", line 154, in __get__
    value = self._fget(obj)
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/unstructured/partition/html/partition.py", line 160, in last_modified
    if not self._file_path or is_temp_file_path(self._file_path)
                              ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/home/Marsman1996/afgen/test/.venv/lib/python3.13/site-packages/unstructured/utils.py", line 68, in is_temp_file_path
    return file_path.startswith(tempfile.gettempdir())
           ^^^^^^^^^^^^^^^^^^^^
AttributeError: 'PosixPath' object has no attribute 'startswith'

Description

I'm trying to use langchain to parse HTML file and give a Path type variable according to the doc.
The doc says UnstructuredHTMLLoader could receive file_path: str | List[str] | Path | List[Path].
However, actually it could only deal with the str type input...

System Info

$ python -m langchain_core.sys_info                      

System Information
------------------
> OS:  Linux
> OS Version:  #52-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec  5 13:09:44 UTC 2024
> Python Version:  3.13.0 (main, Oct 16 2024, 03:23:02) [Clang 18.1.8 ]

Package Information
-------------------
> langchain_core: 0.3.29
> langchain: 0.3.14
> langchain_community: 0.3.14
> langsmith: 0.2.10
> langchain_text_splitters: 0.3.5

Optional packages not installed
-------------------------------
> langserve

Other Dependencies
------------------
> aiohttp: 3.11.11
> async-timeout: Installed. No version info available.
> dataclasses-json: 0.6.7
> httpx: 0.28.1
> httpx-sse: 0.4.0
> jsonpatch: 1.33
> langsmith-pyo3: Installed. No version info available.
> numpy: 1.26.4
> orjson: 3.10.13
> packaging: 24.2
> pydantic: 2.9.2
> pydantic-settings: 2.7.1
> PyYAML: 6.0.2
> requests: 2.32.3
> requests-toolbelt: 1.0.0
> SQLAlchemy: 2.0.36
> tenacity: 9.0.0
> typing-extensions: 4.12.2
> zstandard: Installed. No version info available.