PEP 810 Proposes Explicit Lazy Imports for Python 3.15 - Soc...
Blog post from Socket
PEP 810 introduces an opt-in `lazy` keyword to Python 3.15, aiming to improve startup times by deferring imports until they are first used, particularly benefiting command-line interfaces (CLIs). This proposal, which has sparked significant discussion among developers, offers a local and explicit approach that contrasts with the previously rejected PEP 690, as it avoids global changes and uses lightweight proxy objects instead. By allowing developers to control lazy imports on a granular level, library authors can manage how and when laziness is applied without affecting downstream users, potentially reducing memory usage and improving performance-sensitive areas. While it promises faster startup times, particularly for CLI tools, concerns remain about potential late errors and thread-safety issues. The community's mixed reactions highlight enthusiasm for the performance benefits alongside caution over possible risks, with the proposal still under review by the Python Steering Council.
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