开云体育

One practice is for a distro to have both Python 2.7 and python 3.x installed. The command “python” usually defaults to Python 2.7.

If the distro has done this then you will probably find the following in /usr/bin (taken from my Rasberry Pi 2B)

lrwxrwxrwx 1 root root 9 Mar 28 2015 python -> python2.7
lrwxrwxrwx 1 root root 9 Mar 28 2015 python2 -> python2.7
-rwxr-xr-x 1 root root 3201580 Sep 26 2018 python2.7
lrwxrwxrwx 1 root root 9 Dec 5 2014 python3 -> python3.4
-rwxr-xr-x 2 root root 3816928 Sep 26 2018 python3.4

The critical thing to realize here is that the command “python” can quite easily be changed to any installed version of Python. However you do have to remember that some programs that use “python” may, in fact, assume a prticular version.

To get Python 3.7, you might have to add a PPA for it to the repository list. After that your do an "apt update” and you should be good to go.




On Jan 15, 2020, at 12:40, Oristo <ormpoa@...> wrote:

Probably they are part of a bigger package,
but here I need the advice of a Linux expert...

You probably want e.g, python3-numpy, python3-pyqt5, etc
Be aware that there are incompatible versions of Python
and many Linux distros try support more than Python 3..

When I was researching how to install 3.7 alongside my system default version (Ubuntu/Kubuntu) without breaking it I found what is claimed to be a "preferred PPA" among Python developers. It indeed installed 3.7 without clashing with the system's preferred version. Where there is a will, there is a way.

73

-Jim
NU0C

On Wed, 15 Jan 2020 13:22:27 -0800
"Rick Commo" <rick.commo@...> wrote:

One practice is for a distro to have both Python 2.7 and python 3.x installed. The command “python” usually defaults to Python 2.7.

If the distro has done this then you will probably find the following in /usr/bin (taken from my Rasberry Pi 2B)

lrwxrwxrwx 1 root root 9 Mar 28 2015 python -> python2.7
lrwxrwxrwx 1 root root 9 Mar 28 2015 python2 -> python2.7
-rwxr-xr-x 1 root root 3201580 Sep 26 2018 python2.7
lrwxrwxrwx 1 root root 9 Dec 5 2014 python3 -> python3.4
-rwxr-xr-x 2 root root 3816928 Sep 26 2018 python3.4

The critical thing to realize here is that the command “python” can quite easily be changed to any installed version of Python. However you do have to remember that some programs that use “python” may, in fact, assume a prticular version.

To get Python 3.7, you might have to add a PPA for it to the repository list. After that your do an "apt update” and you should be good to go.




On Jan 15, 2020, at 12:40, Oristo <ormpoa@...> wrote:

Probably they are part of a bigger package,
but here I need the advice of a Linux expert...

You probably want e.g, python3-numpy, python3-pyqt5, etc
Be aware that there are incompatible versions of Python
and many Linux distros try support more than Python 3..

Jim,

By any cgance was it the one shown below? I got this from:

sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.7

Thanks,
-rick, K7LOG

That's it! How could I not remember deadsnakes....

I generally use the muon package manager to search for packages that I don't know the exact name of. Command line apt-get is for when you know what you want. :D

73

-Jim
NU0C


On Wed, 15 Jan 2020 14:29:49 -0800
"Rick Commo" <rick.commo@...> wrote:

Jim,

By any cgance was it the one shown below? I got this from:

sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.7

Thanks,
-rick, K7LOG

On Jan 15, 2020, at 13:58, Jim Shorney <jshorney@...> wrote:


When I was researching how to install 3.7 alongside my system default version (Ubuntu/Kubuntu) without breaking it I found what is claimed to be a "preferred PPA" among Python developers. It indeed installed 3.7 without clashing with the system's preferred version. Where there is a will, there is a way.

73

-Jim
NU0C

On Wed, 15 Jan 2020 13:22:27 -0800
"Rick Commo" <rick.commo@...> wrote:

One practice is for a distro to have both Python 2.7 and python 3.x installed. The command “python” usually defaults to Python 2.7.

If the distro has done this then you will probably find the following in /usr/bin (taken from my Rasberry Pi 2B)

lrwxrwxrwx 1 root root 9 Mar 28 2015 python -> python2.7
lrwxrwxrwx 1 root root 9 Mar 28 2015 python2 -> python2.7
-rwxr-xr-x 1 root root 3201580 Sep 26 2018 python2.7
lrwxrwxrwx 1 root root 9 Dec 5 2014 python3 -> python3.4
-rwxr-xr-x 2 root root 3816928 Sep 26 2018 python3.4

The critical thing to realize here is that the command “python” can quite easily be changed to any installed version of Python. However you do have to remember that some programs that use “python” may, in fact, assume a prticular version.

To get Python 3.7, you might have to add a PPA for it to the repository list. After that your do an "apt update” and you should be good to go.




On Jan 15, 2020, at 12:40, Oristo <ormpoa@...> wrote:

Probably they are part of a bigger package,
but here I need the advice of a Linux expert...

You probably want e.g, python3-numpy, python3-pyqt5, etc
Be aware that there are incompatible versions of Python
and many Linux distros try support more than Python 3..