[Distutils] Is there any harm in clearing sys.path_importer_cache from time to time?

[Jim Fulton]

I have a script based on setuptools that invokes easy install to  
check for
and download newer distributions.  I allow users to specify whether or
not they want unzipped downloads.  As a result, easy_install will  
sometimes
replace a zip file with a directory or the other way around.  This  
leads to
problems in the invoking program because the sys.path_importer_cache
is stale.  Does anyone know if it is safe to clear the cache from  
time to
time?  If so, I'd be inclined to clear it any time I invoke  
easy_install.

If it isn't safe, I'll probably just forego the feature of letting users
force downloads to be unzipped, which I may do anyway to be safe. :)

Jim

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