Disable use of pyc file with no matching py file

[Jean-Michel Pichavant]

Terry Reedy wrote:
> On 1/31/2012 9:19 AM, Jean-Michel Pichavant wrote:
>
>> A: "My wheel is flat"
>> B: "Buy a new car"
>
> A better analogy would be
>
> Q. "How do I make my old model car do something (it cannot do)?"
> A. "Get the free new model that has that feature added."
>
> Of course, there is a cost to giving up the old and familiar and 
> learning and adjusting to the new, even when it is available gratis. A 
> husband wearing an old sweater after his wife gives him a new one, and 
> even retrieving it from the trash when she tosses it out, is a classic 
> (and true) cartoon joke.
>
> But I am sure that 95% of readers here will be using 3.x withing 10 
> years. The only question for them is "When?". This not-well-known new 
> feature is one straw that some will put on the 'sooner' side of the 
> balance.
>
A simple solution to that problem has been provided by Miki. Someone 
should read at least http://wiki.python.org/moin/Python2orPython3 before 
migrating to python 3.

Speaking for myself, I'm stuck with python 2.5 :-/

JM