RAG Evaluation in Python: RAGAS vs DeepEval vs TruLens Compared (2026)
RAGAS vs DeepEval vs TruLens for Python RAG evaluation in 2026: side-by-side metrics, LLM-as-judge setup, code, and CI/CD integration.
Tools & Libraries
Reviews and guides for development tools
FastAPI Streaming in 2026: SSE, WebSockets, and NDJSON for LLM and ML APIs
A hands-on guide to FastAPI streaming in 2026 using native SSE, WebSockets, and NDJSON. Real production patterns for LLM APIs: disconnects, heartbeats, Nginx and Cloudflare buffering, and testing with httpx and k6.
LiteLLM in Python: One API for OpenAI, Anthropic, Bedrock, and Gemini with Cost Tracking (2026)
A hands-on 2026 guide to LiteLLM in Python: the SDK, the self-hosted proxy, cost tracking, fallbacks, Redis semantic caching, and the production trade-offs that matter.
Skrub in Python: Automated Feature Engineering for Messy Tabular Data (2026)
Skrub 0.9 turns messy pandas or Polars DataFrames into sklearn-ready features with one call. Covers TableVectorizer, tabular_pipeline, encoders, fuzzy joins, and DataOps.
Python Vector Databases in 2026: LanceDB vs Qdrant vs ChromaDB vs Milvus vs pgvector Compared
Benchmark LanceDB, Qdrant, ChromaDB, Milvus, and pgvector for Python RAG in 2026. QPS, latency, recall, and a decision matrix so you can pick the right vector store without reading vendor-written benchmarks.
Docling in Python: A Practical 2026 Guide to Parsing PDFs, DOCX, and HTML for RAG
IBM's open-source Docling library turns PDFs, DOCX, PPTX, XLSX, and HTML into clean Markdown or JSON for RAG. This 2026 guide covers install, table extraction, HybridChunker, LangChain and LlamaIndex integrations, plus how it stacks up to Unstructured and LlamaParse.
Ibis in Python: Portable Analytics for DuckDB, BigQuery, and Snowflake (2026)
Ibis 12 compiles one Python DataFrame API to DuckDB, BigQuery, Snowflake, and 20+ other backends. A data engineer's practical 2026 walkthrough with trade-offs.
LLM Observability in Python: Langfuse vs LangSmith vs Arize Phoenix (2026)
Langfuse vs LangSmith vs Arize Phoenix for LLM observability in Python: pricing, self-hosting, OpenTelemetry support, and real production tradeoffs from someone who has shipped all three.
Delta Lake in Python with delta-rs: Merge, Time Travel, and Z-Order Without Spark (2026)
A hands-on guide to Delta Lake in Python with delta-rs 1.6: install, write and read from pandas/Polars, MERGE upserts, time travel and RESTORE, OPTIMIZE with Z-ORDER, plus a production checklist. No Spark or JVM required.
DSPy 3.0 in Python: Programming (Not Prompting) LLMs in 2026
DSPy 3.0 turns prompt engineering into a compile step. Build typed LLM programs in Python, then let MIPROv2 optimize prompts against a metric on your data.
Structured LLM Outputs in Python: Instructor vs Outlines vs Pydantic AI (2026)
Instructor, Outlines, and Pydantic AI each solve structured LLM outputs a different way. Here is how to choose in 2026, with working code and FastAPI patterns.
SQLMesh vs dbt in 2026: Virtual Data Environments, Free Backfills, and When to Switch
Honest 2026 comparison of SQLMesh and dbt: virtual data environments, free backfills, Python models, dbt Fusion, and a real migration framework with code examples.