Issue: <CSVLoader can't load>
Labels: name: area: doc loader, name: auto:bug

### Issue you'd like to raise.

why CSVLoader can't load?  error:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[25], line 1
----> 1 from langchain.document_loaders.csv_loader import CSVLoader
      3 loader = CSVLoader(file_path='./data/bugreport.csv', csv_args={
      4     'delimiter': ',',
      5     'quotechar': '"',
      6     'fieldnames': ["URL","Resolved","Backport_of","Submitted","Status","CPU","Priority","Sub_Component","Updated","Fix_Versions","Affected_Version","OS","Type","Resolution","Component"]
      7 })
      9 data = loader.load()

File D:\miniconda\lib\site-packages\langchain\document_loaders\__init__.py:49
     47 from langchain.document_loaders.bigquery import BigQueryLoader
     48 from langchain.document_loaders.bilibili import BiliBiliLoader
---> 49 from langchain.document_loaders.blackboard import BlackboardLoader
     50 from langchain.document_loaders.blob_loaders import (
     51     Blob,
     52     BlobLoader,
     53     FileSystemBlobLoader,
     54     YoutubeAudioLoader,
     55 )
     56 from langchain.document_loaders.blockchain import BlockchainDocumentLoader

File D:\miniconda\lib\site-packages\langchain\document_loaders\blackboard.py:1
----> 1 from langchain_community.document_loaders.blackboard import BlackboardLoader
      3 __all__ = ["BlackboardLoader"]

File D:\miniconda\lib\site-packages\langchain_community\document_loaders\__init__.py:51
     49 from langchain_community.document_loaders.bigquery import BigQueryLoader
     50 from langchain_community.document_loaders.bilibili import BiliBiliLoader
---> 51 from langchain_community.document_loaders.blackboard import BlackboardLoader
     52 from langchain_community.document_loaders.blob_loaders import (
     53     Blob,
     54     BlobLoader,
     55     FileSystemBlobLoader,
     56     YoutubeAudioLoader,
     57 )
     58 from langchain_community.document_loaders.blockchain import BlockchainDocumentLoader

File D:\miniconda\lib\site-packages\langchain_community\document_loaders\blackboard.py:10
      7 from langchain_core.documents import Document
      9 from langchain_community.document_loaders.directory import DirectoryLoader
---> 10 from langchain_community.document_loaders.pdf import PyPDFLoader
     11 from langchain_community.document_loaders.web_base import WebBaseLoader
     14 class BlackboardLoader(WebBaseLoader):

File D:\miniconda\lib\site-packages\langchain_community\document_loaders\pdf.py:18
     16 from langchain_community.document_loaders.base import BaseLoader
     17 from langchain_community.document_loaders.blob_loaders import Blob
---> 18 from langchain_community.document_loaders.parsers.pdf import (
     19     AmazonTextractPDFParser,
     20     DocumentIntelligenceParser,
     21     PDFMinerParser,
     22     PDFPlumberParser,
     23     PyMuPDFParser,
     24     PyPDFium2Parser,
     25     PyPDFParser,
     26 )
     27 from langchain_community.document_loaders.unstructured import UnstructuredFileLoader
     29 logger = logging.getLogger(__file__)

File D:\miniconda\lib\site-packages\langchain_community\document_loaders\parsers\__init__.py:5
      3 from langchain_community.document_loaders.parsers.grobid import GrobidParser
      4 from langchain_community.document_loaders.parsers.html import BS4HTMLParser
----> 5 from langchain_community.document_loaders.parsers.language import LanguageParser
      6 from langchain_community.document_loaders.parsers.pdf import (
      7     PDFMinerParser,
      8     PDFPlumberParser,
   (...)
     11     PyPDFParser,
     12 )
     14 __all__ = [
     15     "BS4HTMLParser",
     16     "DocAIParser",
   (...)
     24     "PyPDFParser",
     25 ]

File D:\miniconda\lib\site-packages\langchain_community\document_loaders\parsers\language\__init__.py:1
----> 1 from langchain_community.document_loaders.parsers.language.language_parser import (
      2     LanguageParser,
      3 )
      5 __all__ = ["LanguageParser"]

File D:\miniconda\lib\site-packages\langchain_community\document_loaders\parsers\language\language_parser.py:24
     18 try:
     19     from langchain.text_splitter import Language
     21     LANGUAGE_EXTENSIONS: Dict[str, str] = {
     22         "py": Language.PYTHON,
     23         "js": Language.JS,
---> 24         "cobol": Language.COBOL,
     25     }
     27     LANGUAGE_SEGMENTERS: Dict[str, Any] = {
     28         Language.PYTHON: PythonSegmenter,
     29         Language.JS: JavaScriptSegmenter,
     30         Language.COBOL: CobolSegmenter,
     31     }
     32 except ImportError:

File D:\miniconda\lib\enum.py:437, in EnumMeta.__getattr__(cls, name)
    435     return cls._member_map_[name]
    436 except KeyError:
--> 437     raise AttributeError(name) from None

AttributeError: COBOL

### Suggestion:

_No response_