DEV Community: wilmer jelko lazaro guerra

How to Build a Self-Healing Python Script That Never Fails

wilmer jelko lazaro guerra — Mon, 11 May 2026 15:00:04 +0000

Building a self-healing Python script is crucial for ensuring continuous execution and minimizing downtime in automated tasks. A self-healing script can detect and recover from errors, making it an essential tool for mission-critical applications. In this article, we will explore the concepts and techniques required to build a self-healing Python script that never fails.

In this article:

Understanding Self-Healing Scripts
Error Handling in Python
Logging in Python
Create a logger

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/how-to-build-a-self-healing-python-script-that-never-fails-1

Building a Token-Efficient AI Agent With Python and Ollama: Boosting Performance While Reducing Costs

wilmer jelko lazaro guerra — Sun, 10 May 2026 15:00:03 +0000

Token efficiency is a critical aspect of building AI agents, particularly those that rely on natural language processing (NLP) and machine learning algorithms. The efficiency of an AI agent's token usage directly impacts its performance, scalability, and cost-effectiveness. In this article, we will explore how to build a token-efficient AI agent using Python and Ollama, a cutting-edge framework fo

In this article:

Introduction to Token Efficiency in AI Agents
Understanding Ollama and Its Role in Token Efficiency
Load a pre-trained model
Fine-tune the model for your specific task

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/building-a-token-efficient-ai-agent-with-python-and-ollama-boosting-performance-while-reducing-costs-1

Python Decorators for ETL Validation: Patterns That Save Hours

wilmer jelko lazaro guerra — Sat, 09 May 2026 15:00:04 +0000

Python decorators are a powerful feature in the Python programming language that allows developers to modify the behavior of function or class without changing its implementation. In the context of ETL (Extract, Transform, Load) validation, decorators can be used to simplify and streamline the validation process, saving hours of development time. In this article, we will explore the use of Python

In this article:

Introduction to Python Decorators
Using Decorators for ETL Validation
Test the decorator
Patterns for ETL Validation

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/python-decorators-for-etl-validation-patterns-that-save-hours-1-1-1-1-1-1-1

How to Profile and Speed Up Any Python Pipeline by 10x

wilmer jelko lazaro guerra — Fri, 08 May 2026 15:00:03 +0000

Profiling and optimizing Python pipelines is crucial for ensuring efficient data processing, reduced computational costs, and improved overall system performance. In this article, we will explore the steps to profile and speed up any Python pipeline by 10x, using a combination of built-in tools, libraries, and best practices.

In this article:

Understanding the Importance of Profiling
Example Use Case: Profiling a Simple Pipeline
Optimizing Python Pipelines
1. Vectorization

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/how-to-profile-and-speed-up-any-python-pipeline-by-10x-1

Build a Local AI Stack With Zero Cloud Cost in 2026: A Step-by-Step Guide

wilmer jelko lazaro guerra — Thu, 07 May 2026 15:00:03 +0000

Building a local AI stack can be a cost-effective and efficient way to develop and deploy AI models, especially for small to medium-sized projects. With the advancements in open-source AI tools and frameworks, it's now possible to build a local AI stack with zero cloud cost. In this article, we'll explore the steps to build a local AI stack, leveraging open-source tools and frameworks for AI model

In this article:

Introduction to Local AI Stack
Choosing the Right Open-Source Tools
Setting Up the Local AI Stack
Install TensorFlow

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/build-a-local-ai-stack-with-zero-cloud-cost-in-2026-a-step-by-step-guide-1

DataStage Anywhere vs Apache Spark: Migration Decision Guide

wilmer jelko lazaro guerra — Wed, 06 May 2026 15:00:04 +0000

When it comes to data integration and processing, two popular options are DataStage Anywhere and Apache Spark. Both tools have their strengths and weaknesses, and choosing the right one for your organization can be a daunting task. In this article, we will compare DataStage Anywhere and Apache Spark, and provide a migration decision guide to help you make an informed decision.

In this article:

Introduction to DataStage Anywhere
Introduction to Apache Spark
Comparison of DataStage Anywhere and Apache Spark
Migration Considerations

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/datastage-anywhere-vs-apache-spark-migration-decision-guide-1

ETL Testing Automation: 5 Patterns That Catch 90% of Data Bugs

wilmer jelko lazaro guerra — Tue, 05 May 2026 15:00:03 +0000

Extract, Transform, Load (ETL) processes are crucial in data integration, but they can be error-prone. Manual testing of ETL processes is time-consuming and often ineffective. ETL testing automation is essential to ensure data quality and integrity. In this article, we will explore five patterns that can catch 90% of data bugs in ETL testing automation.

In this article:

Understanding ETL Testing Automation
Benefits of ETL Testing Automation
Pattern 1: Data Validation
Example Code: Data Validation using Python

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/etl-testing-automation-5-patterns-that-catch-90-of-data-bugs-1

Oracle BULK COLLECT vs Python Pandas: When to Use Each for Efficient Data Processing

wilmer jelko lazaro guerra — Mon, 04 May 2026 15:00:03 +0000

When working with large datasets, efficient data processing is crucial for optimal performance. Two popular tools for data processing are Oracle's BULK COLLECT and Python's Pandas library. In this article, we will explore the differences between Oracle BULK COLLECT and Python Pandas, and provide guidance on when to use each for efficient data processing.

In this article:

Introduction to Oracle BULK COLLECT
Introduction to Python Pandas
Create a sample dataframe
Print the dataframe

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/oracle-bulk-collect-vs-python-pandas-when-to-use-each-for-efficient-data-processing-1

How to Validate 1 Billion Rows of Migrated Data Without Breaking Production

wilmer jelko lazaro guerra — Sun, 03 May 2026 15:00:04 +0000

Data migration is a crucial process in any organization, involving the transfer of large amounts of data from one system to another. However, ensuring the accuracy and integrity of the migrated data is a significant challenge, especially when dealing with massive datasets. In this article, we will explore the steps to validate 1 billion rows of migrated data without breaking production, using a co

In this article:

Understanding the Challenges of Data Validation
Pre-Validation Steps
Example Code: Data Profiling using Python
Load the data

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/how-to-validate-1-billion-rows-of-migrated-data-without-breaking-production-1

Unlock the Full Potential of DataStage: Mastering Sequential File Stage for Enhanced Performance

wilmer jelko lazaro guerra — Sat, 02 May 2026 15:00:04 +0000

IBM DataStage is a leading data integration tool used by organizations to design, develop, and deploy data workflows. One of the key components of DataStage is the Sequential File Stage, which allows users to read and write sequential files. In this article, we will delve into the world of Sequential File Stage and explore hidden performance tricks to optimize your data integration workflow.

In this article:

Introduction to DataStage Sequential File Stage
Understanding the Basics of Sequential File Stage
Optimizing File Properties for Better Performance
Define the file properties

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/unlock-the-full-potential-of-datastage-mastering-sequential-file-stage-for-enhanced-performance-1

How to Monetize a Technical Blog With Gumroad in 30 Days

wilmer jelko lazaro guerra — Fri, 01 May 2026 15:00:03 +0000

Monetizing a technical blog can be a challenging task, especially for those who are new to the world of online business. However, with the right strategies and tools, it's possible to start generating revenue from your blog in as little as 30 days. In this article, we'll explore how to monetize a technical blog with Gumroad, a popular platform for selling digital products.

In this article:

Understanding Gumroad and its Benefits
Creating Digital Products for Your Technical Blog
Setting Up Gumroad Products and Pricing
Example Gumroad Product Setup

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/how-to-monetize-a-technical-blog-with-gumroad-in-30-days-1

The Developer's Guide to Building a $5000/Month Digital Product Stack

wilmer jelko lazaro guerra — Thu, 30 Apr 2026 15:00:03 +0000

As a developer, you have a unique opportunity to create a digital product stack that can generate significant passive income. With the right strategy and execution, you can build a stack that brings in $5000 or more per month. In this article, we'll explore the key components of a successful digital product stack and provide a step-by-step guide on how to build one.

In this article:

Identifying Your Niche
Creating Your Digital Products
Building Your Sales Funnel
Pricing and Revenue Streams

Read the full article on NexMind →

Originally published at https://nexmind3.hashnode.dev/the-developers-guide-to-building-a-5000month-digital-product-stack-1