Most direct way to strip unoprintable characters out of a string?

[Steve Bergman]

Fredrik Lundh wrote:

>("sanitizing" HTML data by running filters over encoded 8-bit data is hardly
>ever the right thing to do...)
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I'm very much open to suggestions as to the right way to do this.  I'm 
working on this primarily as a learning project and security is my 
motivation for wanting to strip  the unprintables.

Is there a better way? (This is a mod_python app , just for reference.)

Thanks,
Steve