Is Python 3.4 backwards compatible for 2.7 programs/libraries? -

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i deciding whether install python 3.4 or 2.7 on home server running ubuntu server 14.04.2. want ensure has support used python libraries (scipy, numpy, requests, etc) not sure how many of these packages support 3.4.

do 2.7 packages work on 3.4? if no, differences between 2 causes errors?

minor versions of python backwards compatible, major versions not maintain backwards compatibility. there many libraries work both, language not make guarantee.


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