[py-dev] py-trunk runs on python3 quite well now!

[holger krekel]

Hi all, 

good news!  py-trunk on bitbucket now runs rather well on 
top of Python 3.1.1 and remains compatible to python back 
to 2.4.  Many thanks to Benjamin Peterson who contributed 
among other chunks new and simpler "assert" interpretation 
code - now enabled by default on CPython 2.5 till 3.1

Most everything works except for one functional
test: distributed testing across the 3k version barrier.  
That would obviously be interesting to get working 
because it would allow unified test runs across 
all versions. 

Apart from the compatibility work i did tons of 
removal of old or unused code, reviewed and refactored 
tests and code to live in fewer files - aiming for much
more readable source and a 1:1 mapping of namespaces
to directory/file structure.  

best, 
holger

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