langchain-ai / chat-langchain

https://chat.langchain.com
MIT License
5.46k stars 1.28k forks source link

IndexError: list index out of range in index = faiss.IndexFlatL2(len(embeddings[0])) #68

Open louria opened 1 year ago

louria commented 1 year ago

File "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/faiss.py", line 347, in __from
index = faiss.IndexFlatL2(len(embeddings[0]))


IndexError: list index out of range
Vikkas-goel commented 1 year ago

i also got the same error

heneEkene commented 1 year ago

same

Terranic commented 1 year ago

also seeing this:

│ ❱ 1 import_docs()                                                                                │
│   2                                                                                              │
│                                                                                                  │
│ in import_docs:33                                                                                │
│                                                                                                  │
│   30 │                                                                                           │
│   31 │   documents = text_splitter.split_documents(langchain_documents)                          │
│   32 │   embeddings = OpenAIEmbeddings(openai_api_key=OPENAI_API_KEY, )                          │
│ ❱ 33 │   vectorstore = FAISS.from_documents(documents, embeddings)                               │
│   34 │                                                                                           │
│   35 │   # Save vectorstore                                                                      │
│   36 │   with open("./openlegalquerybase/embedded_docs.pkl", "wb") as file:                      │
│                                                                                                  │
│ /home/cw/miniconda3/lib/python3.10/site-packages/langchain/vectorstores/base.py:116 in           │
│ from_documents                                                                                   │
│                                                                                                  │
│   113 │   │   """Return VectorStore initialized from documents and embeddings."""                │
│   114 │   │   texts = [d.page_content for d in documents]                                        │
│   115 │   │   metadatas = [d.metadata for d in documents]                                        │
│ ❱ 116 │   │   return cls.from_texts(texts, embedding, metadatas=metadatas, **kwargs)             │
│   117 │                                                                                          │
│   118 │   @classmethod                                                                           │
│   119 │   @abstractmethod                                                                        │
│                                                                                                  │
│ /home/cw/miniconda3/lib/python3.10/site-packages/langchain/vectorstores/faiss.py:345 in          │
│ from_texts                                                                                       │
│                                                                                                  │
│   342 │   │   │   │   faiss = FAISS.from_texts(texts, embeddings)                                │
│   343 │   │   """                                                                                │
│   344 │   │   embeddings = embedding.embed_documents(texts)                                      │
│ ❱ 345 │   │   return cls.__from(texts, embeddings, embedding, metadatas, **kwargs)               │
│   346 │                                                                                          │
│   347 │   @classmethod                                                                           │
│   348 │   def from_embeddings(                                                                   │
│                                                                                                  │
│ /home/cw/miniconda3/lib/python3.10/site-packages/langchain/vectorstores/faiss.py:307 in __from   │
│                                                                                                  │
│   304 │   │   **kwargs: Any,                                                                     │
│   305 │   ) -> FAISS:                                                                            │
│   306 │   │   faiss = dependable_faiss_import()                                                  │
│ ❱ 307 │   │   index = faiss.IndexFlatL2(len(embeddings[0]))                                      │
│   308 │   │   index.add(np.array(embeddings, dtype=np.float32))                                  │
│   309 │   │   documents = []                                                                     │
│   310 │   │   for i, text in enumerate(texts):                                                   │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯

IndexError: list index out of range

pseudotensor commented 1 year ago

same error

ankur-00007 commented 1 year ago

It is because document is not created on your local, may be your html file is not downloaded. Check the document length.

maximuslee1226 commented 1 year ago

Is there a resolution to this problem? I am also experiencing this in a larger doc.

xinj7 commented 1 year ago

same problem here...

Umer786277 commented 1 year ago

same problem

mkasajim commented 1 year ago

I am also getting this error.

rgresock commented 1 year ago

I experienced the same issue using the DirectoryLoader until I set the loader_cls parameter.

    loader = DirectoryLoader("C:\\directory",loader_cls=TextLoader,
                             recursive=True, show_progress=True, 
                             use_multithreading=True,max_concurrency=8)
    raw_documents = loader.load()

Replaces line 12 of ingest.py

_Don't forget to update the import statement: from langchain.document_loaders import DirectoryLoader,TextLoader_

dantenull commented 1 year ago

I also encountered this mistake. Because the file I loaded was empty. When I added some text, the problem was solved.

kashifML commented 1 year ago

same error

EsaNuurtamo commented 1 year ago

Same exact error

davidzhr commented 1 year ago

yes, the same error

danlzh commented 1 year ago

I encountered the same error.

I first tried to downgrade to langchain==0.0.120 and replace the docs URL but it still doesn't work. ReadTheDocsLoader is trying to parse the HTML, but the structure has since changed so it couldn't pares and load the docs.

If you want to try the demo, here is a quick workaround:

# Just manually copy some document text, 
# and modify `ingest.py` a little so it doesn't require the `ReadTheDocsLoader`:

text = """the langchain docs copied from the website"""

def ingest_docs():
      doc = Document(page_content=text, metadata={"source": str("https://api.python.langchain.com/en/latest/api_reference.html")})
      raw_documents = [doc]

      #...
Revanth-guduru-balaji commented 1 year ago

Same error . My pdf is 92 pages for the source document .Used Faiss vectorstore. langchain==0.0.251

Skisquaw commented 1 year ago

Using this on a bunch of pdfs: loader = DirectoryLoader(DATA_PATH_PDF, glob='*.pdf', loader_cls=PyPDFLoader, show_progress=True)

They load without error but then get the same error: index = faiss.IndexFlatL2(len(embeddings[0])) IndexError: list index out of range

trinkwasser commented 1 year ago

i get the same error when creating a new vectorstore

Skisquaw commented 1 year ago

I think I might have found the issue. One of the pdfs I was reading did not have any text (it was scanned text) and the reader read the page_content text as blank string '' for all pages. You may need to do some OCR on your pdf to get the text out first before sending to FAISS

Zachary-Syd commented 1 year ago

I got the same error when creating a new FAISS vectorstore with texts and embeddings. I resolved it by passing a list(zip(texts_list, embeddings_list)) instead of zip(texts_list, embeddings_list).

The following example in the FAISS API document in LangChain does not work and will lead to the "out of index" error. https://api.python.langchain.com/en/latest/vectorstores/langchain.vectorstores.faiss.FAISS.html?highlight=faiss#langchain.vectorstores.faiss.FAISS.from_embeddings

from langchain import FAISS
from langchain.embeddings import OpenAIEmbeddings

embeddings = OpenAIEmbeddings()
text_embeddings = embeddings.embed_documents(texts)
text_embedding_pairs = zip(texts, text_embeddings)
faiss = FAISS.from_embeddings(text_embedding_pairs, embeddings)

The following code works for me:

from langchain import FAISS
from langchain.embeddings import OpenAIEmbeddings

embeddings = OpenAIEmbeddings()
text_embeddings = embeddings.embed_documents(texts)
text_embedding_pairs = zip(texts, text_embeddings)
text_embedding_pairs_list = list(text_embedding_pairs)
faiss = FAISS.from_embeddings(text_embedding_pairs_list, embeddings)
Photon48 commented 1 year ago

Re-check your documents. They might need OCR recognition before being read as text. They might not be readable by your current PDF loader. So there was no text in the first embeddings[0] to actually retrieve from, thus the error. That was my problem.

drskennedy commented 1 year ago

I had the same error thrown again function scrape_kbs:

  File "KBScrapeVectorize.py", line 130, in scrape_kbs
    db = FAISS.from_documents(docs, embeddings)
...
index = faiss.IndexFlatL2(len(embeddings[0]))
IndexError: list index out of range

This function was supposed to scrape relevant details from some knowledge base articles, create documents and use them to create a vectorstore. However, when I checked the documents created from the scraped KBs, there were all empty as the auth had failed to the site. Once I corrected the auth and documents had some content, FAISS.from_documents worked fine.

MuvvaThriveni commented 1 year ago

Can anyone got solution? please help me to solve the error

MuvvaThriveni commented 1 year ago

File "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/faiss.py", line 347, in __from index = faiss.IndexFlatL2(len(embeddings[0])) ~~^^^ IndexError: list index out of range

Not able to solve the error please help me to solve the error

Skisquaw commented 1 year ago

I posted what I think is the answer already. You have an empty document that you are trying to put into FAISS. Remove any docs that are empty

On Oct 14, 2023, at 9:49 AM, MuvvaThriveni @.***> wrote:

File "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/faiss.py", line 347, in __from index = faiss.IndexFlatL2(len(embeddings[0])) ~~^^^ IndexError: list index out of range

Not able to solve the error please help me to solve the error

— Reply to this email directly, view it on GitHub https://github.com/langchain-ai/chat-langchain/issues/68#issuecomment-1763037422, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABIHCIQ3G53VQSWTEM6CU3DX7K7BTANCNFSM6AAAAAAXQUITZI. You are receiving this because you commented.

MuvvaThriveni commented 1 year ago

Thanks for reply

here you can see what i am doing I am loading some urls and then splitting the data and creating embeddings using openai and lastly using faiss to store my embeddings but facing the list index out of range. could you please help me to solve the problem....

loader = UnstructuredURLLoader(urls=urls) data = loader.load()

# split data
text_splitter = CharacterTextSplitter(separator='\n', chunk_size=1000,

chunk_overlap=200) docs = text_splitter.split_documents(data)

# embeddings
embeddings = OpenAIEmbeddings()

# save embeddings to FAISS index
vectorstore_openai = FAISS.from_embeddings(docs,embeddings)

On Sun, 15 Oct 2023 at 01:26, Skisquaw @.***> wrote:

I posted what I think is the answer already. You have an empty document that you are trying to put into FAISS. Remove any docs that are empty

On Oct 14, 2023, at 9:49 AM, MuvvaThriveni @.***> wrote:

File "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/faiss.py", line 347, in __from index = faiss.IndexFlatL2(len(embeddings[0]))



Not able to solve the error please help me to solve the error

—
Reply to this email directly, view it on GitHub <
https://github.com/langchain-ai/chat-langchain/issues/68#issuecomment-1763037422>,
or unsubscribe <
https://github.com/notifications/unsubscribe-auth/ABIHCIQ3G53VQSWTEM6CU3DX7K7BTANCNFSM6AAAAAAXQUITZI>.

You are receiving this because you commented.

— Reply to this email directly, view it on GitHub https://github.com/langchain-ai/chat-langchain/issues/68#issuecomment-1763163697, or unsubscribe https://github.com/notifications/unsubscribe-auth/A2OUNOLKOASD2R7WV23IOHTX7LU6JAVCNFSM6AAAAAAXQUITZKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTONRTGE3DGNRZG4 . You are receiving this because you commented.Message ID: @.***>

MuvvaThriveni commented 1 year ago

Yes I found docs are empty... Now I am facing other issue

023-10-17 21:43:14.139 Uncaught app exception Traceback (most recent call last): File "C:\VS_CODE\langchain\Equity Research Analysis\venv\Lib\site-packages\streamlit\runtime\scriptrunner\script_runner.py", line 565, in _run_script exec(code, module.dict) File "C:\VS_CODE\langchain\Equity Research Analysis\app.py", line 52, in

vectorstore_openai = FAISS.from_embeddings(docs,embeddings) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\VS_CODE\langchain\Equity Research Analysis\venv\Lib\site-packages\langchain\vectorstores\faiss.py", line 641, in from_embeddings texts = [t[0] for t in text_embeddings] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\VS_CODE\langchain\Equity Research Analysis\venv\Lib\site-packages\langchain\vectorstores\faiss.py", line 641, in texts = [t[0] for t in text_embeddings] ~^^^ TypeError: 'Document' object is not subscriptable Can You please help me to solve the error On Tue, 17 Oct 2023 at 18:14, Thriveni 5J6 ***@***.***> wrote: > Thanks for reply > > here you can see what i am doing > I am loading some urls and then splitting the data and creating embeddings > using openai and lastly using faiss to store my embeddings > but facing the list index out of range. > could you please help me to solve the problem > loader = UnstructuredURLLoader(urls=urls) > data = loader.load() > > # split data > text_splitter = CharacterTextSplitter(separator='\n', chunk_size=1000, > chunk_overlap=200) > docs = text_splitter.split_documents(data) > > # embeddings > embeddings = OpenAIEmbeddings() > > # save embeddings to FAISS index > vectorstore_openai = FAISS.from_embeddings(docs,embeddings) > > On Sun, 15 Oct 2023 at 01:26, Skisquaw ***@***.***> wrote: > >> I posted what I think is the answer already. You have an empty document >> that you are trying to put into FAISS. Remove any docs that are empty >> >> > On Oct 14, 2023, at 9:49 AM, MuvvaThriveni ***@***.***> wrote: >> > >> > >> > File >> "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/faiss.py", >> line 347, in __from index = faiss.IndexFlatL2(len(embeddings[0])) >> ~~~~~~~~~~^^^ IndexError: list index out of range >> > >> > Not able to solve the error please help me to solve the error >> > >> > — >> > Reply to this email directly, view it on GitHub < >> https://github.com/langchain-ai/chat-langchain/issues/68#issuecomment-1763037422>, >> or unsubscribe < >> https://github.com/notifications/unsubscribe-auth/ABIHCIQ3G53VQSWTEM6CU3DX7K7BTANCNFSM6AAAAAAXQUITZI>. >> >> > You are receiving this because you commented. >> > >> >> — >> Reply to this email directly, view it on GitHub >> , >> or unsubscribe >> >> . >> You are receiving this because you commented.Message ID: >> ***@***.***> >> >
Yupjun commented 11 months ago

If anyone has this trouble, try iterating each chunk whether that check has the value or not. I checked that if the given chunk is empty, it fails like this (exit 0)

mdsimarspan commented 10 months ago

index = faiss.IndexFlatL2(len(embeddings[0])) IndexError: list index out of range

This looks like an ERROR def merge_from in faiss

Also Shows AttributeError: type object 'FAISS' has no attribute 'IndexFlatL2' when tried to print. IndexFlatL2.

PaulinaHernandez commented 10 months ago

I get what a lot of you are saying about the files being empty but I am using the same files he is using in the video and still the same error, I also already try the suggestionsin the things trend and still the same

Jeet-beep commented 10 months ago

@MuvvaThriveni did you get it how to solve this error.Pls help me

ap4ashutosh commented 9 months ago

I had the same error but when I changed the pdf file. The issue was resolved. So I think all pdfs can't be processed so OCR based tools will come handy.

Pratikdate commented 9 months ago

Same error

tekina96 commented 8 months ago

Those who are here from the codebasics LLM video

you can use this code -> if process_url_clicked:

load data

loader = UnstructuredURLLoader(urls=urls)
main_placefolder.text("Data Loading...Started...✅✅✅")
data = loader.load()

if data:
    # split data
    text_splitter = RecursiveCharacterTextSplitter(
        separators=['\n\n', '\n', '.', ','],
        chunk_size=1000
    )
    main_placefolder.text("Text Splitter...Started...✅✅✅")
    docs = text_splitter.split_documents(data)

    if docs:
        # create embeddings and save it to FAISS index
        embeddings = OpenAIEmbeddings()
        vectorstore_openai = FAISS.from_documents(docs, embeddings)
        main_placefolder.text("Embedding Vector Started Building...✅✅✅")
        time.sleep(2)

        # Save the FAISS index to a pickle file
        vectorstore_openai.save_local(file_path)
    else:
        main_placefolder.text("Text Splitter produced empty documents. Check data.")
else:
    main_placefolder.text("Data loading failed. Check URLs or network connection.")

Also Note: in the Requirements.txt folder there is python-magic and libmagic which is not required, so uninstall them from pycharm by doing pip uninstall libmagic pip uninstall python-magic pip uninstall python-magic-bin pip install python-magic-bin==0.4.14

Now run the code. Hope it'll be helpful

vijayalaxmi200 commented 8 months ago

TypeError Traceback (most recent call last) in <cell line: 3>() 2 file_path="/content/drive/MyDrive/Deep Learning/News Research Tool/vector_index.pkl" 3 with open(file_path,"wb") as f: ----> 4 pickle.dump(vectorindex_openai, f)

TypeError: cannot pickle '_thread.RLock' object please slove the error

zealot52099 commented 8 months ago

If you get this error when using "FAISS.from_documents(docs, emb_model)", please make sure that input docs is not empty. Hope it helps !

vijayalaxmi200 commented 8 months ago

my docs is not empty . but its showing error in TypeError: cannot pickle '_thread.RLock' object like this

Rahulpradeep-001 commented 7 months ago

my docs is not empty . but its showing error in TypeError: cannot pickle '_thread.RLock' object like this

just downgrade your open ai and langchain versions to the specified ones.

then you may encounter an error where it says davinci -002 is a deprecated version then just change the model as

llm = OpenAI(model="gpt-3.5-turbo-instruct", temperature=0.9, max_tokens=500)

you should be fine and good to go... hope this helps

Gousia-Khanam commented 7 months ago

Once you installed all necessary libraries. If same error still persist , it is because of no data in the data folder.

aryan757 commented 6 months ago

File "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/faiss.py", line 347, in __from index = faiss.IndexFlatL2(len(embeddings[0])) ~~^^^ IndexError: list index out of range

yaa , i got the solution ... Try using pdf with less page & check , it won't go out of index .,

Paramjethwa commented 2 months ago

Those who are here from the codebasics LLM video

you can use this code -> if process_url_clicked: # load data loader = UnstructuredURLLoader(urls=urls) main_placefolder.text("Data Loading...Started...✅✅✅") data = loader.load()

if data:
    # split data
    text_splitter = RecursiveCharacterTextSplitter(
        separators=['\n\n', '\n', '.', ','],
        chunk_size=1000
    )
    main_placefolder.text("Text Splitter...Started...✅✅✅")
    docs = text_splitter.split_documents(data)

    if docs:
        # create embeddings and save it to FAISS index
        embeddings = OpenAIEmbeddings()
        vectorstore_openai = FAISS.from_documents(docs, embeddings)
        main_placefolder.text("Embedding Vector Started Building...✅✅✅")
        time.sleep(2)

        # Save the FAISS index to a pickle file
        vectorstore_openai.save_local(file_path)
    else:
        main_placefolder.text("Text Splitter produced empty documents. Check data.")
else:
    main_placefolder.text("Data loading failed. Check URLs or network connection.")

Also Note: in the Requirements.txt folder there is python-magic and libmagic which is not required, so uninstall them from pycharm by doing pip uninstall libmagic pip uninstall python-magic pip uninstall python-magic-bin pip install python-magic-bin==0.4.14

Now run the code. Hope it'll be helpful

dude love you!!!! your code solved my index out of list range error but now it is showing error for pickle file being corrupted or incompatible here is it UnpicklingError: invalid load key, '\xef'. Traceback: File "C:\Users\Param Jethwa\AppData\Roaming\Python\Python311\site-packages\streamlit\runtime\scriptrunner\exec_code.py", line 88, in exec_func_with_error_handling result = func() ^^^^^^ File "C:\Users\Param Jethwa\AppData\Roaming\Python\Python311\site-packages\streamlit\runtime\scriptrunner\script_runner.py", line 590, in code_to_exec exec(code, module.dict) File "C:\Users\Param Jethwa\langchain\2_news_research_tool_project\main.py", line 67, in vectorstore = pickle.load(f) ^^^^^^^^^^^^^^

dineshdk154 commented 1 month ago

I have changed the api key in env file but it's showing wrong key always please someone know how resolve it please let me know

dineshdk154 commented 1 month ago

Thanks for reply here you can see what i am doing I am loading some urls and then splitting the data and creating embeddings using openai and lastly using faiss to store my embeddings but facing the list index out of range. could you please help me to solve the problem.... loader = UnstructuredURLLoader(urls=urls) data = loader.load() # split data text_splitter = CharacterTextSplitter(separator='\n', chunk_size=1000, chunk_overlap=200) docs = text_splitter.split_documents(data) # embeddings embeddings = OpenAIEmbeddings() # save embeddings to FAISS index vectorstore_openai = FAISS.from_embeddings(docs,embeddings) On Sun, 15 Oct 2023 at 01:26, Skisquaw @.> wrote: I posted what I think is the answer already. You have an empty document that you are trying to put into FAISS. Remove any docs that are empty > On Oct 14, 2023, at 9:49 AM, MuvvaThriveni @.> wrote: > > > File "/usr/local/lib/python3.11/site-packages/langchain/vectorstores/faiss.py", line 347, in __from index = faiss.IndexFlatL2(len(embeddings[0])) ~~^^^ IndexError: list index out of range > > Not able to solve the error please help me to solve the error > > — > Reply to this email directly, view it on GitHub < #68 (comment)>, or unsubscribe < https://github.com/notifications/unsubscribe-auth/ABIHCIQ3G53VQSWTEM6CU3DX7K7BTANCNFSM6AAAAAAXQUITZI>. > You are receiving this because you commented. > — Reply to this email directly, view it on GitHub <#68 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/A2OUNOLKOASD2R7WV23IOHTX7LU6JAVCNFSM6AAAAAAXQUITZKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTONRTGE3DGNRZG4 . You are receiving this because you commented.Message ID: @.***> I got a error in that api key is wrong I also changed the key in env but it's showing the same please let me know if you know the answer

Pourush31 commented 1 week ago

I have changed the api key in env file but it's showing wrong key always please someone know how resolve it please let me know

Did you get the solution yet?

dineshdk154 commented 1 week ago

No bro

On Sat, Nov 9, 2024, 7:19 PM Pourush31 @.***> wrote:

I have changed the api key in env file but it's showing wrong key always please someone know how resolve it please let me know

Did you get the solution yet?

— Reply to this email directly, view it on GitHub https://github.com/langchain-ai/chat-langchain/issues/68#issuecomment-2466223331, or unsubscribe https://github.com/notifications/unsubscribe-auth/AY4TPHHFGBRTKNS6WP2LRQTZ7YHGBAVCNFSM6AAAAAAXQUITZKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDINRWGIZDGMZTGE . You are receiving this because you commented.Message ID: @.***>

dineshdk154 commented 1 week ago

Did you get it ?

On Sat, Nov 9, 2024, 7:22 PM Dinesh Kumar M @.***> wrote:

No bro

On Sat, Nov 9, 2024, 7:19 PM Pourush31 @.***> wrote:

I have changed the api key in env file but it's showing wrong key always please someone know how resolve it please let me know

Did you get the solution yet?

— Reply to this email directly, view it on GitHub https://github.com/langchain-ai/chat-langchain/issues/68#issuecomment-2466223331, or unsubscribe https://github.com/notifications/unsubscribe-auth/AY4TPHHFGBRTKNS6WP2LRQTZ7YHGBAVCNFSM6AAAAAAXQUITZKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDINRWGIZDGMZTGE . You are receiving this because you commented.Message ID: @.***>

ap4ashutosh commented 1 week ago

Have you tried to use logger or print the API key that is it really able to fetch that or not. And another thing about API keys in .env when you use in linux production and your API key is named USER or anything similar to linux envs then that would not work. Please check those.