That’s the classical Modular Software Design. What it misses, though, is testability. If a business-module has a lot of complex business logic, it cannot be easily tested, since the business logic is mixed with the untestable infrastructure code (e.g. file system or network calls) that lies in the same module. So we need to introduce a separation, and that’s where Infrastructure-Modules come into play.
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，详情可参考51吃瓜
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Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00295-4
conn = sqlite3.connect(DB)