python-error-handling SKILL.md skillA
python-error-handling from jartan-llc/grimoire is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jartan-llc/grimoire/python-error-handling@git:20260731.f6add68Pins git:20260731.f6add68 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jartan-llc/grimoire
- Path
plugins/pythonica/skills/python-error-handling/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260731.f6add68, committed Jul 31, 2026
- First version recorded
- Jun 18, 2026
- Size
- 5,892 bytes
- Repository stars
- 3
- License
- MIT
Python error handling patterns including input validation, exception hierarchies, and partial failure handling.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Python Error Handling
Build robust Python applications with proper input validation, meaningful exceptions, and graceful failure handling. Good error handling makes debugging easier and systems more reliable.
## Core Concepts
### 1. Fail Fast
Validate inputs early, before expensive operations. Report all validation errors at once when possible.
### 2. Meaningful Exceptions
Use appropriate exception types with context. Messages should explain what failed, why, and how to fix it.
### 3. Partial Failures
In batch operations, don't let one failure abort everything. Track successes and failures separately.
### 4. Preserve Context
Chain exceptions to maintain the full error trail for debugging.
## Quick Start
```python
def fetch_page(url: str, page_size: int) -> Page:
if not url:
raise ValueError("'url' is required")
if not 1 <= page_size <= 100:
raise ValueError(f"'page_size' must be 1-100, got {page_size}")
# Now safe to proceed...
```
## Fundamental Patterns
### Pattern 1: Early Input Validation
Validate all inputs at API boundaries before any processing begins.
```python
def process_order(
order_id: str,
quantity: int,
…Read the whole file at its exact version.
How to install
mdr add jartan-llc/grimoire/python-error-handling@sha256:3739590d97a3ce39The line at the top of this page pins the label git:20260731.f6add68, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_lc4r4vv3gw3fasee)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 18, 2026 and Jul 31, 2026, about one every 43 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260731.f6add68 latest | 2026-07-31 | f6add68 | 5,892 B | A | view · diff |
| git:20260618.9d9291d | 2026-06-18 | 9d9291d | 5,870 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5892 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
jartan-llc/grimoire · 3 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lc4r4vv3gw3fasee GET https://markdownregistry.com/api/v1/resolve?ref=jartan-llc/grimoire/python-error-handling GET https://markdownregistry.com/api/v1/blob/3739590d97a3ce39d04128e1c355d22498f7af708243d1efa52927107269cadd
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