Langchain document loader giving "Resource punkt_tab not found" error

[quasarswastik]

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

loader = AzureBlobStorageFileLoader(
    conn_str=conn_str,
    container=container,
    blob_name=blob,
)
 document = loader.load()```

### Error Message and Stack Trace (if applicable)

_No response_

### Description

- I am trying to use Langchain to load the documents using `AzureBlobStorageFileLoader`. 
- When loading the document I get an error related to nltk that seems upstream to langchain 
- I could fix the problem temporarily by using a downgraded version of nltk. `nltk == 3.8.1`
![image](https://github.com/user-attachments/assets/f803ddc6-ecae-4b45-8c62-e35016cccc41)


### System Info

langchain==0.2.12
langchain-community==0.2.11
langchain-core==0.2.29
langchain-experimental==0.0.36
langchain-text-splitters==0.2.2

Platform: Ubuntu WSL2 on Windows 10
Containerisation: Docker version 27.0.2, build 912c1dd
Python: Python 3.10.12

[quasarswastik]

**********************************************************************
Resource punkt_tab not found.
Please use the NLTK Downloader to obtain the resource:

>>> import nltk
>>> nltk.download('punkt_tab')

For more information see: https://www.nltk.org/data.html

Attempted to load tokenizers/punkt_tab/english/

Searched in:
- '/home/myLowPrivilegeUser/nltk_data'
- '/venv/nltk_data'
- '/venv/share/nltk_data'
- '/venv/lib/nltk_data'
- '/usr/share/nltk_data'
- '/usr/local/share/nltk_data'
- '/usr/lib/nltk_data'
- '/usr/local/lib/nltk_data'
**********************************************************************

[dvdalilue]

@quasarswastik I was getting the same error, you need to update unstructured and probably python-pptx

pip install unstructured==0.15.7 python-pptx==1.0.2