Using Ubuntu 17.04. After update Python 3.5 to 3.6 via terminal according to https://askubuntu.com/a/865569/695385 still showing that version is 3.5.3.
~$ python3 --version Python 3.5.3
How is this installed?
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up.Sign up to join this community
After installing Python3.6:
python3 use the new installed Python 3.6 instead of the default 3.5 release, run following 2 commands:
sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.5 1 sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 2
Finally, switch between the two Python versions for
python3 via the following command:
sudo update-alternatives --config python3
Then select the
/usr/bin/python3.6 -- automode in choices menu, for me that was
$ python3 -V Python 3.6.9
$ python3 --version Python 3.6.9
How did you upgrade? I suspect you may have a
python3.6 binary somewhere.
Generally speaking, you never want to replace
/usr/bin/python3 with your own fruity versions. Important parts of Ubuntu require their stable Python environments, and largely speaking, that is incompatible with you mucking around.
That all said, having a
/usr/local/bin/python3.6, or whatever in your path) would be fine. If you don't want to type all that in each time, you might want to look at
virtualenv and the various wrapper automation options for it. This has the additional bonus of not threatening your system's
site_packages with your development work.
Use Docker and get the Python image for whatever version you want. It's also easy to update.
FROM python:3.6 RUN apt-get update \ && apt-get install -y --no-install-recommends \ postgresql-client \ && rm -rf /var/lib/apt/lists/* WORKDIR /usr/src/app COPY requirements.txt ./ RUN pip install -r requirements.txt COPY . . EXPOSE 8000
Other option is using PPA:
sudo add-apt-repository ppa:jonathonf/python-3.7 sudo apt-get update sudo apt-get install python3.7
And add Python 3.7 to update-alternatives with priority 1.
Visit https://www.python.org/downloads/source/ to find the latest version. Check the current stable version before pulling for install.