Wednesday, September 2, 2026

Durgesh Kekare

Durgesh Kekare is a data science educator and founder of DataExpertise.in. With expertise in Python, machine learning, and analytics, he helps 10,000+ learners break into data careers.

Python for Finance – Stock Analysis & Portfolio Optimization Guide

Python has become the dominant language in quantitative finance. From hedge funds to retail investors, Python powers stock screening, portfolio optimisation, risk modeling, and algorithmic strategy backtesting. This guide...

Pandas vs Polars – Performance Comparison & When to Switch 2026

Polars is the fastest-growing Python data manipulation library of 2025-2026, and for good reason. On large datasets it's 5-50× faster than Pandas, uses significantly less memory, and scales to...

LLM Fine-Tuning with LoRA & PEFT – Practical Python Guide 2026

Fine-tuning a large language model used to require dozens of A100 GPUs and weeks of compute time. LoRA (Low-Rank Adaptation) changed that — it makes fine-tuning a 7B parameter...

Vector Databases & Embeddings – Semantic Search in Python 2026

Traditional keyword search matches exact words. Semantic search understands meaning — a query for "affordable cars" finds results about "budget vehicles" even if those exact words don't appear. The...

Web Scraping with Python – BeautifulSoup & Scrapy Complete Guide

Web scraping lets you collect data from websites that don't offer an API — product prices, news articles, job listings, stock data, research papers. Python has the best ecosystem...