Another BI & Programming Blog - Jason Yousef

Compress a Whole Folder of Images with Python (Resize + Subfolders + Smart PNG→JPEG) If you keep images for a blog, documentation, or a project folder, file size becomes a problem fast. Big images slow down pages, take space, and make sharing annoying. This script automates the cleanup: it walks through a folder (and subfolders), optionally resizes images to a max width, compresses JPEGs, compresses PNGs, and can convert PNG to JPEG when it actually makes sense. When this is useful Before publishing: shrink images for faster blog load times. Docs + screenshots: reduce size without manually exporting every file. Photo folders: compress camera images and keep a clean “compressed” copy. Automation: run it after exporting images from tools like Snipping Tool, Photoshop, or PowerPoint. What it does Walk subfolders automatically and keeps the same folder structure in the output. Resize to a max width (keeps aspect ratio, never upscales). Compress JPEG us...

Generate a PDF Invoice from a Web Form with Flask + WeasyPrint If you already collect invoice details in a simple web form, the next step is usually: generate a clean PDF and download it. This Flask + WeasyPrint setup does exactly that. User submits a form, Flask renders an HTML invoice template, and WeasyPrint converts that HTML into a PDF you can download right away. Typical use cases Quick internal invoices (freelance, side projects, small business) Generate PDFs from structured form data (quotes, receipts, reports) Create consistent PDFs using HTML/CSS instead of “drawing” PDFs manually Install pip install flask weasyprint Note: WeasyPrint may require OS-level libraries depending on your system (common on Linux). If install fails, check the WeasyPrint docs for your OS. Improved script (safer, cleaner, returns PDF download) Changes from the original: Returns the PDF as a download instead of saving a fixed invoice.pdf on disk Basic input cleanup + ...