Python collections Module: A Practical Guide
A practical, up-to-date guide to Python’s collections module — namedtuple, deque, Counter, defaultdict, OrderedDict, ChainMap and the User* wrappers —...
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Articles that strengthen our current focus on AI systems, modernization, and product engineering, alongside the broader engineering archive.
Older posts still cover Django, Python, AWS, Salesforce, React, Flutter, and Svelte, but the clearest current signal is around the three service lanes below.
Django Aggregation: Count, Sum, Avg, Min, Max with aggregate() and annotate()
A practical, modern (Django 5.x) guide to aggregation in the Django ORM: when to use aggregate() vs annotate(), Count/Sum/Avg/Min/Max, grouping with v...
Read articleCreate Excel Files in Python with XlsxWriter: Data, Images & Charts
A practical 2026 guide to creating Excel (.xlsx) files in Python with XlsxWriter - write and format data, insert images, draw bar and column charts, e...
Read articleDjango Custom Template Tags and Filters: A Practical Guide (Django 5.x)
A current, practical guide to writing custom template tags and filters in Django 5.x — templatetags package setup, filters, simple tags, inclusion tag...
Read articleDRF Views Explained: Function, Class-Based, Generic & ViewSets
Django REST Framework offers four view styles, from function-based views (most control) to ViewSets + routers (least code). This practical guide imple...
Read articleCORS with Amazon S3 and CloudFront: The Modern Guide
A current, practical guide to configuring CORS for assets served from Amazon S3 and CloudFront: the modern JSON bucket CORS format, forwarding the Ori...
Read articleExtract Text and Data from PDF and Microsoft Office Files in Python
A practical, up-to-date guide to extracting text and structured data from PDF and Microsoft Office files in Python. Use pdfplumber and pypdf for PDFs,...
Read articleHow to Create PDF Files in Python Using pdfkit (HTML to PDF)
Learn how to convert HTML into PDF files in Python using pdfkit and wkhtmltopdf, with install steps for every OS, working code for from_url/from_file/...
Read articleUnderstanding Python Properties: A Practical Guide to @property
A practical guide to Python's @property decorator: turn methods into managed attributes for computed values, validation, and read-only access without ...
Read articleQR Code Generation in Python: Complete Guide
Generate a QR code in Python in a few lines with the qrcode library. This guide covers the quick start, the QRCode API and error-correction levels, st...
Read articleHow to Create Periodic Tasks in Django with Celery Beat
A practical, up-to-date guide to running scheduled and recurring background tasks in Django using Celery 5.x and Celery Beat: app setup, crontab and i...
Read articleUnderstanding Django Serializers with Examples
A practical guide to Django REST Framework serializers: Serializer vs ModelSerializer, serialization and deserialization, validation, nested and relat...
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