}

Articles tagged "python"

Page 4 of 13

python ai openai llm
8 min readIntermediate

OpenAI Function Calling in Python: Complete Guide 2026 (Tools, Parallel Calls, Streaming)

Learn OpenAI function calling in Python 2026. Define tools, handle tool_calls, run parallel function calls, stream with tools, and build a real assistant with weather and calendar tools.

python ai pydantic agents
4 min readIntermediate

PydanticAI Tutorial 2026: Build Type-Safe AI Agents in Python

PydanticAI tutorial 2026: build type-safe AI agents in Python with FastAPI-style dependency injection. Covers tools, structured results, testing without LLM calls, and local Ollama integration.

rag langchain pgvector postgresql python
7 min readIntermediate

RAG with Python, LangChain and PostgreSQL pgvector as Vector Store (2026)

Build a RAG pipeline with Python, LangChain, and PostgreSQL pgvector. Load documents, create embeddings, store in pgvector, and query with an LLM. Complete working example.

python ai postgresql pgvector rag
4 min readIntermediate

Build a RAG System from Scratch with Python and pgvector (No LangChain, 2026)

Build a RAG chatbot from scratch using Python and PostgreSQL pgvector — no LangChain needed. Covers chunking, embeddings with Ollama, vector search, and a working chat-with-docs example.

python ai pydantic llm
7 min readIntermediate

Structured Output from LLMs with Python: Reliable JSON Using Pydantic and Instructor (2026)

Get reliable JSON from LLMs using Python. Learn to use the instructor library with Pydantic to extract structured data from OpenAI, Claude, and local Ollama models. 2026 guide.

python ai whisper speech-to-text
7 min readIntermediate

Whisper AI: Local Speech-to-Text with Python — No API Key Needed (2026)

Transcribe audio locally with OpenAI Whisper and Python — no API key required. Covers faster-whisper, timestamps, batch processing, ffmpeg pipeline, and SRT export. Free 2026 guide.

python file-system
6 min readBeginner

Python: Check if File or Directory Exists — os.path, pathlib, try/except (2026)

How to check if a file exists in Python using os.path.exists(), pathlib Path.exists(), and try/except. Complete guide with examples for files and directories.

python postgresql pip
4 min readBeginner

SOLVED: error: pg_config executable not found (psycopg2 pip install)

Fix "error: pg_config executable not found" when pip install psycopg2 fails. Install postgresql-dev headers or use psycopg2-binary instead.

flask python rest api gunicorn nginx
8 min readIntermediate

Flask REST API Complete Guide 2026 — POST, abort, gunicorn, nginx

Build a Flask REST API in 2026. Covers POST endpoints, request.get_json(), flask.abort() with JSON, gunicorn workers, and nginx reverse proxy. Flask 3.x with examples.

python errors debugging programming exceptions
6 min readBeginner

Most Common Python Errors and How to Fix Them (2026)

The most common Python errors in 2026 with fixes: ModuleNotFoundError, IndentationError, TypeError, AttributeError, NameError, and more. Direct solutions with code examples.