It's just luck that it works — 74.5% of 455 AI libraries were importing dependencies not listed in requirements.txt

Yet, it's a ModuleNotFoundError in CI. When you ask an AI agent to 'set this up and run it,' it stops at the very first step.
InfoWorld

Speed boost your Python programs with new lazy imports

No more waiting on slow-loading modules or wasting time on ad hoc workarounds: Python 3.15’s new ‘lazy imports’ mechanism has you covered. When you import a module in Python, the module’s code must be ...