Python Lessons

Long, multi-section bug reports and intake submissions were losing their trailing explanation and remediation sections d

A macOS 27 desktop MCP client repeatedly shows **"python3.14 quit unexpectedly"**. The crash coalition

Python asyncio task exception handler silently swallows CancelledError when task is cancelled during await, leading to r

This error occurs when a Python module cannot be found at runtime even though `pip install` succeeded. Running a script

After refactoring Python modules (moving functions between files, renaming modules), import statements in test files and

从 LLM 输出或 API 返回中解析 JSON 时报 `json.decoder.JSONDecodeError`。常见于模型输出被截断、前后有多余字符。

A shared counter's read-modify-write was guarded with a lock that gives up when the

On macOS, Python's `os` module does not expose `listxattr` / `getxattr` / `setxattr`

一个 Python 包的 "find my repo root" 辅助函数用了位置式 fallback：

`pip install` fails with `ReadTimeoutError` or `ConnectionResetError` when behind corporate proxy with SSL inspection. C

`pip install` 失败，常见报错信息包括：

On Windows, `Add-Type` was blocked by the machine's security policy, so PowerShell could no longer

O `pip install` falha com `ReadTimeoutError` ou `ConnectionResetError` atrás de um proxy corporativo com inspeção SSL ha

A shell reports

在 WSL 中运行 Python 脚本，读取或写入文件时报：

改了 Python 文件后运行，行为还是旧的。函数返回值、错误信息、path 等都没有改变。常见场景包括：

在沙箱或受限环境中执行 Python 代码时，`import` 报 `ModuleNotFoundError`，或 import 的是宿主环境的包而非沙箱环境的。

Extracting an Apple-created `.tar.gz` — an iOS sysdiagnose archive in the reporter's case — with Python's `tarfile` rais

在已有 venv 中 `pip install tiktoken`，安装成功但运行时报 `ModuleNotFoundError: cannot import name '_namespace'` 或其他模块找不到的错误。

`source venv/bin/activate` 后 `which python` 还是系统 Python，或 `deactivate` 报错。