How to update python from 3.5.2 to 3.5.3 on Linux

[Matt Ruffalo]

On 2017-05-03 12:43, Thomas Nyberg wrote:
> On 05/03/2017 11:47 AM, Wolfgang Maier wrote:
>> On 03.05.2017 17:11, Thomas Nyberg wrote:
>>> On 05/03/2017 11:04 AM, Daiyue Weng wrote:
>>>> nope, I was thinking it might be good to update to 3.5.3 for security
>>>> reasons?
>>>>
>>> (CCing back in python-list since I accidentally dropped it.)
>>>
>>> I wouldn't worry about it. Package managers tend to usually take care of
>>> security updates. (Of course there is criticism of Linux Mint saying
>>> they're not as great at this...) Looking at Ubuntu 16.04, they are still
>>> on 3.5.1 (plus Ubuntu's own patches):
>>>
>>>     http://packages.ubuntu.com/xenial/python3
>>>
>> Maybe I'm mistaken here, but I don't think that is fully true. With an
>> LTS version of Ubuntu you I don't think you will *ever* get upgraded to
>> a new Python version. Instead Canonical will backport changes from new
>> maintainance releases like 3.5.2/3.5.3 to older releases of the same
>> minor version (like the 3.5 series). So while the package for Python3.5
>> for Ubuntu 16.04 will seem pinned at version 3.5.1 over the lifetime of
>> the OS, the actual Python version you are running may be newer. In fact,
>> on my 16.04:
>>
>> % apt list python3
>> python3/xenial,now 3.5.1-3 amd64 [installed]
>>
>> % python3 -V
>> Python 3.5.2
>>
>> I have no clue how Mint handles this though.
>>
>> Wolfgang
>>
> Interesting...learn something new every day! I knew that they would
> backport security updates, but I never realized they would actually use
> a newer (micro) version of the interpreter while retaining the original
> number on the package. (Of course using a newer micro version really
> just means officially backporting all those patches...which might mean
> basically the same thing as just using the newer micro release and
> adding their own changes.)
>
> Anyway thanks for pointing this out! This is exactly the kind of
> misconception that could fester for a long time without my every
> realizing it.
>
> Cheers,
> Thomas

This isn't quite true -- Ubuntu 14.04 shipped with Python 3.4.0, but was
updated at some point to 3.4.3 (which will be installed automatically
through normal update mechanisms).

MMR...