This is a concise Python 3 programming tutorial for people who think that reading is boring. I try to show everything with simple code examples; there are no long and complicated explanations with ...

# Relational operators are used to compare two values. # They always return True or False. # We use them inside if statements to make decisions.

这篇文章把 Streamlit 最常用的三块内容串了一遍：多页面怎么组织、数据库怎么连、文件怎么处理。 streamlit 这几年在数据科学圈子里火得很快。不用学前端，不用折腾路由，纯 Python 就能把数据分析脚本变成像模像样的 Web 应用。但真要拿它做点正事 —— 比如搭 ...

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