python-pro

python-pro is a skill for Claude Code, Codex from eric861129/SKILLS_All-in-one. It costs 83 tokens per session (1,402 once invoked), scanned A, a copy of python-pro, MIT.

A guide for writing modern Python 3.11 and newer code with type annotations, asynchronous programming, error handling, and automated tests.

In plain words
What is it for?
Use it to build packages, define typed interfaces, write pytest tests, and check code with mypy, Black, and Ruff.
Why use it?
It helps detect type mistakes and code-quality problems early while keeping Python projects easier to maintain.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to build packages, define typed interfaces, write pytest tests, and check code with mypy, Black, and Ruff.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/eric861129/skills_all-in-one/python-pro
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add eric861129/SKILLS_All-in-one --skill python-pro
Clone the repo
git clone --depth 1 https://github.com/eric861129/SKILLS_All-in-one

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for python-pro

README.md
[![agentmods](https://agentmods.dev/badge/skills/eric861129/skills_all-in-one/python-pro/github.svg)](https://agentmods.dev/skills/eric861129/skills_all-in-one/python-pro)
Your own site
<a href="https://agentmods.dev/skills/eric861129/skills_all-in-one/python-pro"><img src="https://agentmods.dev/badge/skills/eric861129/skills_all-in-one/python-pro/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for python-pro

Your own site · 80×15
<a href="https://agentmods.dev/skills/eric861129/skills_all-in-one/python-pro"><img src="https://agentmods.dev/badge/skills/eric861129/skills_all-in-one/python-pro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,402 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 98% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00083 $0.01402
Opus 5 $0.00042 $0.00701
Sonnet 5 $0.00017 $0.00280
Haiku 4.5 $0.00008 $0.00140

Measured 6d ago against content hash de993ff64a33, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

python-pro scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

98% identical to python-pro — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

public/SKILLS/Development & Code Tools/python-pro/SKILL.md · 178 lines

How it starts

The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Python Pro

Modern Python 3.11+ specialist focused on type-safe, async-first, production-ready code.

When to Use This Skill

  • Writing type-safe Python with complete type coverage
  • Implementing async/await patterns for I/O operations
  • Setting up pytest test suites with fixtures and mocking
  • Creating Pythonic code with comprehensions, generators, context managers
  • Building packages with Poetry and proper project structure
  • Performance optimization and profiling

Core Workflow

  1. Analyze codebase — Review structure, dependencies, type coverage, test suite
  2. Design interfaces — Define protocols, dataclasses, type aliases
  3. Implement — Write Pythonic code with full type hints and error handling
  4. Test — Create comprehensive pytest suite with >90% coverage
  5. Validate — Run mypy --strict, black, ruff
    • If mypy fails: fix type errors reported and re-run before proceeding
    • If tests fail: debug assertions, update fixtures, and iterate until green
    • If ruff/black reports issues: apply auto-fixes, then re-validate

Reference Guide

Load detailed guidance based on context:

Topic Reference Load When
Type System references/type-system.md Type hints, mypy, generics, Protocol
Async Patterns references/async-patterns.md async/await, asyncio, task groups
Standard Library references/standard-library.md pathlib, dataclasses, functools, itertools
Testing references/testing.md pytest, fixtures, mocking, parametrize
Packaging references/packaging.md poetry, pip, pyproject.toml, distribution

Constraints

MUST DO

  • Type hints for all function signatures and class attributes
  • PEP 8 compliance with black formatting
  • Comprehensive docstrings (Google style)
  • Test coverage exceeding 90% with pytest
  • Use X | None instead of Optional[X] (Python 3.10+)
  • Async/await for I/O-bound operations
  • Dataclasses over manual init methods
  • Context managers for resource handling

Read the full file on GitHub · 178 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 178 lines · 83 tokens per session scan A de993ff64a33

Subscribe to this mod's changes

python-pro is a skill published in the GitHub repository eric861129/SKILLS_All-in-one (52 stars, last pushed 4mo ago), licensed MIT. It adds 83 tokens to every session and 1,402 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to python-pro, differing in 2 lines, and is treated as a copy.