Почему я не могу установить Python 3. 8? [duplicate]

Когда я пытаюсь установить терминал Python 3.8, он говорит, что это сделано, но когда я запускаю python --version там написано Python 3.7?

(base) user@admin:~$ sudo apt-get install python3.8
Reading package lists... Done
Building dependency tree       
Reading state information... Done
python3.8 is already the newest version (3.8.2-1ubuntu1.2).
The following packages were automatically installed and are no longer required:
  libllvm9 libllvm9:i386
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 38 not upgraded.
(base) user@admin:~$ python --version
Python 3.7.6
0
задан 25 July 2020 в 18:08

2 ответа

As per the instructions on How to Install Python 3.8 on Ubuntu, Debian and LinuxMint – TecAdmin, try the following:

Prerequisites:

Install [and or update] the following packages; build-essential, checkinstall, libreadline-gplv2-dev, libncursesw5-dev, libssl-dev, libsqlite3-dev, tk-dev, libgdbm-dev, libc6-dev, libbz2-dev, libffi-dev, zlib1g-dev.

sudo apt install build-essential checkinstall
sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev libffi-dev zlib1g-dev

Thereafter, change directory (cd) to your opt folder [or any convenient folder] and download the python source code from python's server:

First change directory (cd) to the 'opt' folder:

cd /opt/

Download the source code

sudo wget https://www.python.org/ftp/python/3.8.3/Python-3.8.3.tgz

Extract the [downloaded] source code files

sudo tar xzf Python-3.8.3.tgz

Change directory (cd) the Python Folder [created after the extraction]

cd Python-3.8.3

Compile the source code

sudo ./configure --enable-optimizations

then

sudo make altinstall

Once the compilation is completed, you can confirm that Python 3.8 has been installed successfully with:

python3.8 -V

You should see the response Python-3.8.3.

However, to precisely answer your question, python 3.8 isn't available via ubuntu official repos. You would have to add a PPA to get python 3.8 using sudo apt install [python3.x.x].

The process is described on How to Install Python 3.8 on Ubuntu 18.04 | Linuxize

Hope this helps and I hope I answered your question adequately.

0
ответ дан 30 July 2020 в 22:03

It looks like Python 3.8 is already installed but not set as default. Python 3.7.6 is set as default.

Update default Python3 version by below command.

sudo update-alternatives --config python3

Choose Python 3.8 option and check Python version again.

0
ответ дан 30 July 2020 в 22:03

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