Why has python3 been created as a seperate language where there is still python2.7 ?

[gmspro]

Hi,

Why has python3 been created as a seperate language where there is still python2.7 ?

What's the benifit to make python3 over python2.7 ? I have read this though: http://docs.python.org/release/3.0.1/whatsnew/3.0.html

What's wrong editing/customizing/changin python2.7 instead of making a seperate language?

What's wrong working with python2.7?

As python3 is not backward compatible, so many packages built on python2.7 will be gone someday. Or you have to re-write/upgrade to python3. That's a tedious/labourious task.

So after 5 years will we get another python4 as seperate language?

Any answer will be highly appreciated.

Thanks.
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