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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: delete namespaces
Date: Wed, 30 Mar 2011 15:03:03 -0400
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On 3/30/2011 5:10 AM, Jean-Michel Pichavant wrote:

> 3/ if you want to do the 2/ but require a painful long prologue to your
> test, then you may want to use the builtin reload. Use it with care,
> because any existing object created from the previous module will not be
> affected, they'll still hold the previous code. "reload" solves some
> problems, but bring others, especially for the newcomer.

Guido removed it in 3.x because it is badly flawed and he could see any 
way to sensibly fix it.

-- 
Terry Jan Reedy