点击上方“Deephub Imba”,关注公众号,好文章不错过 !探索性数据分析（EDA）的本质不是画图和算统计量，而是不被自己的数据欺骗。分类列是最容易出问题的地方。city、category、product、department、role、customer_type——这些列看起来很简单，跑个 ...

Upcoming 50% tariffs on semi-finished and derivative copper products start August 1. Chile, Canada, and Mexico are top U.S. copper sources, potentially impacting tariffs' effects. Copper import ...