[$] Lazy imports for Python

Starting a Python application typically results in a flurry of imports asmodules from various locations (and the modules they import) get addedinto the application process. All of that occurs before the applicationeven gets started doing whatever it is the user actually launched it for;that delay can be significant-and annoying. Beyond that, many of thoseimports may not be necessary at all for the code path being followed, soeagerly doing the import is purely wasted time. A proposal back in Maywould add a way for applications to choose lazy imports, where the importis deferred until the module is actually used.