帖子 Python is finally getting explicit lazy imports.

Python is finally getting explicit lazy imports. Python 3.15 introduces PEP 810, bringing a language-level mechanism to defer importing modules until they are actually needed. The idea is simple: Don't pay the cost of loading a dependency until you use it. For large Python applications, especially CLI tools, this can make a meaningful difference. PEP 810 reports: Up to 50–70% faster startup in some real-world workloads 30–40% lower memory usage observed in some large applications The biggest gains can come when an application has a large dependency tree but only uses a small portion of it during a particular execution. This can be especially interesting for modern AI/GenAI applications with dependencies for: → LLM providers → Vector databases → Cloud SDKs → Observability → Database drivers → Optional integrations One important limitation: Explicit lazy imports are designed for module scope. They don't replace the traditional technique of importing something inside a function when you specifically nee