FAQ

Cornelius K?lbel wrote:

I am wondering about loading modules.What is a good way of doing this?

In my code I got one single function, where I need some functionality
from a built-in module.
built-in modules are always imported by definition, so you cannot save space
or time by moving the import statement into the function. You can find the
true built-in modules with

sys.builtin_module_names

and the modules that may have been imported indirectly by other modules you
are using with

sys.modules
Is it a better way to load the module only within the function
pro: the function will only be hit every now and then or only with a
probability of 90%.
So in 90% cases the modules will not be loaded. (preserve
resources)

What is the balance between speed, resources and code style?
I doubt that you'll save a significant amount of space/time, and you make
your module's dependencies less obvious.
Is there a pythonian way for deciding in which case to do what?
The pythonic approach is to measure; run your script with and without the
tentative optimization and then decide whether the extra complication pays
off.

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postedApr 13, '11 at 3:09p
activeApr 13, '11 at 4:02p
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