📰 Dev.to · German Yamil

click is the better argparse — decorators instead of boilerplate, automatic help text, type validation, and composable commands. Here's how to use it.

A practical pytest guide for Python developers — fixtures, parametrize, mocking, and how to structure tests so they catch bugs before production does.

A practical guide to async programming in Python — when to use it, how it works, and real examples with asyncio, aiohttp, and async generators.

Master Python's functools module: cache expensive calls with lru_cache, freeze arguments with partial, wrap decorators properly with wraps, and fol...

Master Python's collections module: defaultdict eliminates KeyError, Counter counts in one line, deque beats list for queues, namedtuple gives ligh...

Master Python sets: creating sets, set vs list performance, union/intersection/difference, frozenset, comprehensions, and real deduplication patter...

How to use Python to build content systems that generate income while you sleep — real architecture, real costs, real numbers from someone doing it.

Master Python exception handling: catching specific errors, finally for cleanup, raising custom exceptions, and patterns for resilient automation scripts that d

Understand Python decorators from first principles: closures, functools.wraps, stacked decorators, decorators with arguments, and real patterns for retry, timin

Master Python's with statement: built-in context managers, contextlib.contextmanager, class-based managers, and real patterns for cleanup, timing, and locking.

Add type hints to Python functions and variables: basic types, Optional, Union, list[str], dict, Callable, and how to use mypy to catch bugs before runtime.

argparse turns any Python script into a proper CLI tool: help text, type validation, defaults, and subcommands — all from the standard library.

argparse turns any Python script into a proper CLI tool: help text, type validation, defaults, and subcommands — all from the standard library.

Master Python f-strings: expressions, formatting, alignment, numbers, dates, nested quotes, multiline, and debugging with = specifier. Complete reference.

Replace print() with Python's logging module to get timestamps, severity levels, file output, and rotating logs in your automation scripts.

Replace messy dicts with typed, self-documenting dataclasses. field(), __post_init__, frozen, and slots — complete guide with before/after examples.

pathlib.Path replaces os.path, os.makedirs, open(), and glob() with one clean API. Complete guide with before/after examples for every common file operation.

Schedule Python scripts to run automatically with cron: syntax, environment variables, logging, virtual environments, and common errors. Working examples for ma

Build a self-validating Python automation script from scratch: ast.parse() for syntax, subprocess.run() for execution, and a simple state file for resumability.

Platform comparison for selling Python technical ebooks: Gumroad (10% fee, full bundle), KDP (35-70% royalty, Kindle only), Leanpub (20% fee, pay-what-you-want)

Complete guide to Python's ast module: parse source into AST nodes, walk the tree, detect dangerous patterns, and validate code before execution. With working e

Transparent account of 17 days publishing about an automated Python ebook pipeline. 268 views, 0 sales, and the math that explains why — plus what changed.

Before running the pipeline, validate your topic. Three concrete filters: search volume check, existing product audit, and community demand test. Avoid building

Complete build breakdown: state machine, AST+subprocess validation, EN+ES translation QA, EPUB assembly, Gumroad API. Built it to prove the method works — the e