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py-except

在编写 Python 性能敏感代码，尤其是 tick、循环、事件热路径时，避免把异常处理当作常态控制流；优先使用显式判断，并避免裸 except。

Skill by GitHub-Zero123

IndexedBSD-3-Clause★ 59
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

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在编写 Python 性能敏感代码，尤其是 tick、循环、事件热路径时，避免把异常处理当作常态控制流；优先使用显式判断，并避免裸 except。

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What this skill can do and what it asks for, from its SKILL.md and code. Checked Oct 25, 2026.

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  • codeload.github.com · found in install command

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  • ~/.claude/skills/py-except

What's inside

Skill name
py-except
Description
在编写 Python 性能敏感代码，尤其是 tick、循环、事件热路径时，避免把异常处理当作常态控制流；优先使用显式判断，并避免裸 except。
License
BSD-3-Clause
Instructions
36 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

# Python 异常处理优化

用于性能敏感代码，尤其是 tick、循环、事件回调。

规则：

- 不要把 `try/except` 当常态分支使用
- 热路径里优先 `if` 判断，不要频繁依赖异常
- 禁止裸 `except:`，至少捕获明确异常类型
- 异常只用于真正罕见、不可预期的错误
- 频繁路径中，缺失值、空对象、边界情况都应显式处理

原因：

- 异常触发会创建异常对象并收集 traceback，开销明显高于普通判断
- 裸 `except` 会吞掉真实错误，降低可调试性
- 用异常代替分支会让代码语义变差

反例：

```python
try:
    x, y, z = GET_ENTITY_POS(entityId)
except:
    pass
```

推荐：

```python
pos = GET_ENTITY_POS(entityId)
if pos is not None:
    x, y, z = pos
```

From GitHub-Zero123/mcdk-assistant, BSD-3-Clause.

More from GitHub-Zero123/mcdk-assistant

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Stars
59
Forks
8
Open issues
0
Last commit (this folder)
Mar 19, 2026 (7 months ago)
Last release
Sep 24, 2026 (1 month ago)

From GitHub (fetched Oct 24, 2026).

Details

License
BSD-3-Clause
Repository
github.com/GitHub-Zero123/mcdk-assistant
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql

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py-except skill. Agent Mart. https://agentmart.dev/skills/github-zero123-py-except (last updated 2026-10-24)