Python - Can a web server avoid imporing for every

问题:

I'm working on a Python project, currently using Django, which does quite a bit of NLP work in a form post process. I'm using the NLTK package, and profiling my code and experimenting I've realised that the majority of the time the code takes is performing the import process of NLTK and various other packages. My question is, is there a way I can have this server start up, do these imports and then just wait for requests, passing them to a function that uses the already imported packages? This would be much faster and less wasteful than performing such imports on every request. If anybody has any ideas to avoid importing large packages on every request, it'd be great if you could help me out!

Thanks, Callum

回答1:

Django, under most deployment mechanism, does not import modules for every request. Even the development server only reloads code when it changes. I don't know how you're verifying that all the imports are re-run each time, but that certainly shouldn't be happening.