https://github.com/jiseoup/ubuntu-python3-version
How to install and select python3 version in ubuntu 18.04.
https://github.com/jiseoup/ubuntu-python3-version
Last synced: 5 months ago
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How to install and select python3 version in ubuntu 18.04.
- Host: GitHub
- URL: https://github.com/jiseoup/ubuntu-python3-version
- Owner: Jiseoup
- Created: 2022-07-05T08:26:31.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2022-07-13T08:13:37.000Z (over 3 years ago)
- Last Synced: 2025-02-09T08:28:54.211Z (11 months ago)
- Homepage:
- Size: 42 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# INSTALL and SELECT python3 version in Ubuntu 18.04
This document introducing how to *install* and *select* **`python3`** version in **`ubuntu 18.04`**.
## CHECK CURRENT VERSION
```bash
$ python3 --version
```
### Example Output
```bash
Python 3.6.9
```
## INSTALL WITH PACKAGE MANAGER
```bash
$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get install python3.7
$ sudo apt-get install python3.8
```
### Install Python 3.10 Version
**`python3.10`** version is not available in **`ubuntu 18.04`**'s default repositories. So, the python package should be added through an additional repository. We use the repository of [deadsnakes](https://github.com/deadsnakes). If you want to install **`python3.10`** version as well, follow the command below.
```bash
$ sudo apt-get install software-properties-common
$ sudo add-apt-repository ppa:deadsnakes/ppa
$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get install python3.10
```
## VERSION SETTINGS
You can define the priority level as you like, the higher level, the higher priority.
```c
// Set 3.6 version as priority level 1
$ sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.6 1
// Set 3.7 version as priority level 2
$ sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.7 2
// Set 3.8 version as priority level 3
$ sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.8 3
// Set 3.10 version as priority level 4 (Use this command only if you have installed python 3.10 version.)
$ sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.10 4
```
## SELECT VERSION
You can change the version using the command below.
```bash
$ sudo update-alternatives --config python3
```
* You can change the version by entering a number.
* Auto mode uses the highest priority version. -> **`python3.8`**
If you want to return to auto mode, using the command below.
```bash
$ sudo update-alternatives --auto python3
```
## CAUTION !
If you want to use command **`$ sudo apt-get update`**, please use **`python3.6`**, the default version of the **`ubuntu 18.04`** system.