Proposal for .py2, py3, etc. extensions. Was: A way to accommodate laguage changes

[Chris Barker]

James Logajan wrote:

> Sure: your proposal isn't bad. That is, absent any "pragma" the interpreter
> assumes "old" semantics. But it does require programmers doing new
> development to add that line of text in all their modules. And it has the
> nice effect of spitting out an error when run by a 1.5.2 interpreter. But it
> can get tiresome always adding that. So perhaps one should put the indicator
> in the module name itself:

I still think a line at the top of the module would be a limited
inconvenience. It's no more typing than:

while 1:
    x = something
    if something:
	break
	
compared to:
while x = something:

And we all think that's a good idea (don't we!)

In the long, run, I think relying on file extensions ios a bad idea.
Among othetr things, Python code is not neccesarily stored in files at
all (at least not when passed to the interpreter)

Still, on the right track....

-Chris


-- 
Christopher Barker,
Ph.D.                                                           
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