推荐一篇博客，作者介绍在 DS 项目中写测试。毕竟 ML 的项目测试起来和传统的程序不是太一样，除了最基础的 assert, pytest 这些之外对数据的分布和数据一些统计指标也需要做测试。文中提到的几个工具 Hypothesis 和 Pandera 我都是用过的，Pandera 很好用，也可以原生集成给 Pandas/Koalas（Koalas 也是我配合 PySpark 最常用的 DataFrame 工具）。https://www.peterbaumgartner.com/blog/testing-for-data-science/
BY Data Science Archive
Telegram has no known backdoors and, even though it is come in for criticism for using proprietary encryption methods instead of open-source ones, those have yet to be compromised. While no messaging app can guarantee a 100% impermeable defense against determined attackers, Telegram is vulnerabilities are few and either theoretical or based on spoof files fooling users into actively enabling an attack.
The Singapore stock market has alternated between positive and negative finishes through the last five trading days since the end of the two-day winning streak in which it had added more than a dozen points or 0.4 percent. The Straits Times Index now sits just above the 3,060-point plateau and it's likely to see a narrow trading range on Monday.
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