{"schema_version":"1.0","language":"zh-CN","generated_from":"NEWVAR 从零开始学AI structured Markdown","write_access":false,"full_text_access":false,"content_boundary":"This endpoint exposes metadata, objectives, prerequisites, labs and source summaries. It does not expose chapter body text or answer text.","chapter":{"slug":"python-values-and-types","title":"变量、类型与表达式：让计算机保存意义","english_title":"Values and types","chapter_number":5,"volume":1,"volume_title":"第一卷：计算与数学地基","month":2,"unit_title":"Python与计算思维","review_status":"draft","updated_at":"2026-08-06","estimated_hours":8,"focus":"理解值、名称、类型、表达式和状态，避免把变量当成数学里的固定未知数。","objectives":["理解值、名称、类型、表达式和状态，避免把变量当成数学里的固定未知数。","解释核心数学关系并完成最小实现","运行单变量实验并记录失败样例","完成工程线或研究线至少一项迁移任务"],"prerequisites":["ethics-and-impact"],"exercise_count":3,"tracks":["engineering","research"],"human_url":"/learn/python-values-and-types"},"labs":[{"id":"lab-python-values-and-types","chapter_slug":"python-values-and-types","title":"变量、类型与表达式：让计算机保存意义：单变量实验","kind":"type_conversion","data_status":"教学模拟","variable":{"label":"可转换数据比例","unit":"%","min":0,"max":100,"step":5,"default":50},"objective":"只改变“可转换数据比例”，观察结果、代价和风险如何一起变化，理解理解值、名称、类型、表达式和状态，避免把变量当成数学里的固定未知数。","static_fallback":"静态替代：把可转换数据比例分别设为0%、50%和100%，手工比较三组教学模拟输出。","keyboard":"聚焦滑块后使用方向键微调，Page Up/Page Down大步调整，Home/End到达边界。","measurement_note":"页面数值由公开公式生成，只用于教学，不代表真实模型性能或现实世界因果效果。","source_ids":["S003","S006","S082"]}],"project":{"id":"project-02","month":2,"title":"制作一个可测试的学习时间分配器","brief":"用虚构课程数据写命令行程序，支持输入校验、函数拆分、测试和错误提示。","deliverables":["问题与边界说明","可运行最小实现","实验记录与失败分析","来源与许可清单","风险、隐私与人工闸门","复现README"]},"sources":[{"id":"S003","author":"ACM, IEEE-CS, AAAI","title":"Computer Science Curricula 2023","source_level":"专业学会课程框架","published_at":"2024","accessed_at":"2026-08-06","doi_or_url":"https://csed.acm.org/final-report/"},{"id":"S006","author":"Python Software Foundation","title":"Python 3 Documentation","source_level":"官方文档","published_at":"持续更新","accessed_at":"2026-08-06","doi_or_url":"https://docs.python.org/3/"},{"id":"S082","author":"Google","title":"Colaboratory FAQ","source_level":"官方文档","published_at":"持续更新","accessed_at":"2026-08-06","doi_or_url":"https://research.google.com/colaboratory/faq.html"}]}