Using sudo with pip3?

[jim]

On 01/07/2017 05:58 PM, Clint Moyer wrote:
> Not sure how you guys got this thread so far off topic, but I think it
> is valuable to present the current situation in the context of Jim's
> sudo question. Staying on topic, the emphasis should be on taking the
> path of least resistance with your current OS. The only thing to be
> gleaned from PEP394 is that users should not put faith or expectations
> in what their /usr/bin/python symlink points to. Most systems point to
> Python2, but it is not guaranteed.
>
> So to minimize your issues with installing Python packages, take the
> path of least resistance and install through your system repo. And use
> Python2 or Python3 explicitly to avoid conflicts.
>
> --
> Clint
>

As I mentioned in another post, most of the more popular modules I had 
installed on my old system using pip are available in the repository and 
I will use the repository to install them on the new system. I now 
understand that using sudo is a bad idea.

One question from the earlier post that did not get answered concerned 
upgrading a repository installed module with pip. To get started on the 
new system I installed pip3 from the repository. The first time I used 
it to install a module it said a newer version was available and gave 
the command to update it. What are the consequences of using pip to 
upgrade repository installed modules?

I ask because 16.04 is LTS and won't be getting version upgrades unless 
they are security related. Also pandas is in the repositories but the 
module pandas-datareader, which I may need to use, is not.

Regards,  Jim

>
> On Sat, Jan 7, 2017 at 4:39 PM, Chris Angelico <rosuav at gmail.com> wrote:
>> On Sun, Jan 8, 2017 at 9:34 AM, Michael Torrie <torriem at gmail.com> wrote:
>>> On 01/07/2017 11:39 AM, Clint Moyer wrote:
>>>> All Linux operating systems come with Python installed, with more
>>>> recent systems such as Arch defaulting /usr/bin/python to Python3,
>>>> since Python2 discontinued some 7-9 years ago.
>>>
>>> Poor choice of words, in my opinion.  Python 2 has not received new
>>> features for 7-9 years now but it certainly hasn't been "discontinued"
>>> and won't be for some years yet, though new programming (and distros)
>>> should be with Python 3 now.
>>
>> Also, /usr/bin/python shouldn't be Python 3.
>>
>> https://www.python.org/dev/peps/pep-0394/
>>
>> But various distros are moving towards "don't have Python 2 installed
>> by default", which consequently means "no system scripts depend on
>> Python 2".
>>
>> ChrisA