[Python-Dev] Choosing a best practice solution for Python/extension modules (original) (raw)

Steven Bethard steven.bethard at gmail.com
Mon Feb 23 20:45:59 CET 2009

On Mon, Feb 23, 2009 at 04:02, Nick Coghlan <ncoghlan at gmail.com> wrote:

For example, a version that allows any number of extension modules to be suppressed when importing a module (defaulting to the Foo/Foo naming):

import sys def importpythononly(modname, *extnames): if not extnames: extnames = (("" + modname),) origmodules = {} if name in sys.modules: origmodules[name] = sys.modules[name] del sys.modules[name] try: for name in extnames: origmodules[name] = sys.modules[name] sys.modules[name] = 0 pymodule = importlib.importmodule(modname) finally: for name, module in origmodules.items(): sys.modules[name] = module return pymodule

On Mon, Feb 23, 2009 at 11:05 AM, Brett Cannon <brett at python.org> wrote:

Well, neither do I as your proposed approach below is what I do for warnings. But I think you and I, Nick, are more comfortable with mucking with imports than most people. =) I think some people early on in this thread said they didn't like the idea of screwing around with sys.modules. But doing that along with an import * from the extension module is probably the simplest solution.

+1 for something like Nick's code. No one has to know they're mucking around with sys.modules - they just have to use the import_python_only() function. (And I haven't seen anything in this thread that's really any better.)

Steve

I'm not in-sane. Indeed, I am so far out of sane that you appear a tiny blip on the distant coast of sanity. --- Bucky Katt, Get Fuzzy

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