Python
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How to Design Reliable Background Jobs for a Web Application
Move slow work out of request handlers with a queue, idempotent tasks, bounded retries, status tracking, and observability.
2 min read
How to Build CI/CD for a Dockerized Python API
Create a CI/CD pipeline that tests a Python API, builds an immutable container image, scans dependencies, and deploys with a rollback path.
2 min read
How to Generate and Email PDF Reports Automatically
Generate scheduled PDF reports with validated data snapshots, deterministic output, secure delivery, and observable job status.
2 min read
How to Automate Invoice Processing with Python
Build invoice processing around extraction, normalization, validation, human review, and traceable output rather than trusting raw OCR text.
3 min read
How to Automate Excel Reports with Python
Automate recurring Excel reports with validated inputs, reproducible transformations, explicit formatting, and delivery monitoring.
2 min read
How to Fix Memory Growth in a Python Worker
Find memory growth in long-lived Python workers by measuring process behavior, bounding task data, and investigating native and Python allocations.
2 min read
How to Connect a Next.js Frontend to a Django Backend
Connect Next.js to Django with a clear API contract, secure credentials, consistent errors, and reliable local and production configuration.
2 min read
A Practical Observability Checklist for Python APIs in Production
Instrument a Python API with structured logs, metrics, traces, request correlation, and actionable alerts to diagnose production problems without logging sensitive data.
4 min read
How to Validate Structured Output from an LLM in a Production Application
Validate language-model output with schemas, business rules, retries, and explicit failure states instead of assuming generated JSON is correct.
4 min read
How to Deploy a FastAPI Application with Docker
Package a FastAPI service in Docker and prepare it for deployment with configuration, health checks, non-root execution, and production server settings.
4 min read
How to Build a Reliable Webhook Handler with Retries and Idempotency
Build webhook handlers that verify signatures, acknowledge quickly, process events asynchronously, prevent duplicate side effects, and recover from failed deliveries.
4 min read
How to Make Celery Background Jobs Reliable in Django
Design more reliable Celery tasks with idempotency, bounded retries, timeouts, queue separation, monitoring, and explicit handling for failed jobs.
4 min read
How to Find and Fix Slow Django API Endpoints
Diagnose slow Django REST API endpoints by measuring query time, identifying N+1 queries, improving pagination, and checking database indexes before changing infrastructure.
4 min read
How to Extract and Validate Data from PDF Documents Using Python
Build a PDF processing workflow that distinguishes native text from scans, extracts tables, validates fields, and sends uncertain results for review.
5 min read
How to Run Long-Running Python Scripts in the Cloud
Choose a suitable runtime for long Python workloads, package the script with Docker, run it as a Cloud Run Job, and handle storage, retries, and logs.
5 min read
Async Python for Experienced Developers: CPU-Bound vs IO-Bound Work
A practical guide to choosing asyncio, threads, or multiprocessing in Python, based on whether work is CPU-bound or IO-bound, with GIL basics.
4 min read
Blocking the Event Loop: Finding Latency Spikes in Async Python Pipelines
Find and fix blocking calls that stall an asyncio event loop, using debug mode, to_thread and executors, and why asyncio.sleep(0) hides the problem.
4 min read
ThreadPoolExecutor Memory Blowup When You Submit a Million Futures
Why submitting a huge number of tasks to ThreadPoolExecutor exhausts memory, and how bounded submission, chunking, and as_completed keep usage flat.
4 min read
Asyncio Tasks Silently Garbage Collected: Debugging the Disappearing Task
Why a fire-and-forget asyncio task can vanish mid-execution, how to keep strong references, and how TaskGroup makes lifetimes and exceptions explicit.
4 min read
When Async Is Worth It in FastAPI and When Plain def Is Fine
Choose async def or def per endpoint. Learn how FastAPI threadpools sync routes, how blocking calls freeze the event loop, and when async pays off.
5 min read
Celery Worker Killed by the OOM Killer: Diagnose and Fix Memory-Heavy Tasks
Workers disappearing with SIGKILL usually mean memory pressure. Confirm the OOM kill, then fix it with chunking, child recycling and sensible prefetch.
4 min read