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Abstract

="8a53"><pre>apt install -y make build-essential libssl-dev zlib1g-dev
> libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev
> libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python-openssl
> git</pre></div><p id="cf20">After that, we will install the latest version on Pyenv. So, we will need to clone from the Pyenv repository.</p><div id="a958"><pre>git <span class="hljs-built_in">clone</span> https://github.com/pyenv/pyenv.git ~/.pyenv</pre></div><p id="7d94">And for the last step, we must add pyenv to our path so that the <code>pyenv</code> command is recognized globally.</p><div id="465b"><pre><span class="hljs-built_in">echo</span> <span class="hljs-string">'export PYENV_ROOT=" $HOME/.pyenv"'</span> >> ~/.bashrc <span class="hljs-built_in">echo</span> <span class="hljs-string">'export PATH="$ PYENV_ROOT/bin: $PATH"'</span> >> ~/.bashrc <span class="hljs-built_in">echo</span> <span class="hljs-string">'eval "$ (pyenv init --path)"'</span> >> ~/.bashrc</pre></div><p id="566e">Finally, to start using pyenv, restart the shell by running:</p><div id="fe83"><pre><span class="hljs-built_in">exec</span> <span class="hljs-string">"<span class="hljs-variable">$SHELL</span>"</span></pre></div><h1 id="4891">Install Python</h1><p id="01af">To check whether pyenv is already installed on our machine, we can use this command.</p><div id="5ff4"><pre>pyenv --version</pre></div><p id="58be">In mine, the response is <code>pyenv 2.3.6–13-g4c261e6e</code>, if you do not see a result similar to this, then maybe t

Options

here is an error in your installation.</p><p id="7ae1">To see the available python version, you can use this command.</p><div id="07fb"><pre>pyenv install --list</pre></div><p id="bbe9">For example, I will install <code>python 3.9.15</code>. So the command will be like this.</p><div id="6d17"><pre>pyenv install 3.9.15</pre></div><p id="f151">Don’t worry if your terminal doesn’t return anything, the process takes a while. Maybe you can leave it for a while to make coffee or something.</p><p id="2a98">If the installation is already done, you can verify if the python version is already installed, you can use the:</p><div id="f768"><pre>pyenv versions</pre></div><p id="07de">And the result will look like this.</p><div id="a94e"><pre>* system (<span class="hljs-built_in">set</span> by /home/user/.pyenv/version) 3.9.15 </pre></div><p id="a2d1">The <code>*</code> is mean that <code>system</code> is the default python version. To set <code>python 3.9.15</code> as the default python, use the command:</p><div id="2dab"><pre>pyenv global 3.9.15</pre></div><p id="6f93">After that, check the python version.</p><div id="011d"><pre>python --version <span class="hljs-comment"># or python -V</span></pre></div><p id="3e9f">If the python version is 3.9.15 or whatever python version you install, then the python installation is a success. If you want to add another python version, you can just be using <code>pyenv install <version></code> and if you want to change the python version, you can just use <code>pyenv global <version></code>.</p></article></body>

How to Install Python using Pyenv on Ubuntu 20.04

Easy way to install and switch python version

When it comes to python, did you ever find a problem installing or changing the python version? If yes, then we’re the same. I always got a problem when it comes to changing the python version and my only solution at that time is just uninstalling python and re-installing the version that I need.

After dealing with that problem for a long time, I finally found the tools to manage the python version, named Pyenv.

What is Pyenv?

Basically, Pyenv is a tool to simplify installation and version changing in python. It helps developers quickly install or change the python version without needing to change the whole system.

In this post, I will show you how to install pyenv and manage the python version.

Install Pyenv

To start the installation process, it’s a good idea to update the system packages. Open the terminal and write the command below.

apt update -y

After that, let’s install all Pyenv dependencies.

apt install -y make build-essential libssl-dev zlib1g-dev \
> libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev\
> libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python-openssl\
> git

After that, we will install the latest version on Pyenv. So, we will need to clone from the Pyenv repository.

git clone https://github.com/pyenv/pyenv.git ~/.pyenv

And for the last step, we must add pyenv to our path so that the pyenv command is recognized globally.

echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(pyenv init --path)"' >> ~/.bashrc

Finally, to start using pyenv, restart the shell by running:

exec "$SHELL"

Install Python

To check whether pyenv is already installed on our machine, we can use this command.

pyenv --version

In mine, the response is pyenv 2.3.6–13-g4c261e6e, if you do not see a result similar to this, then maybe there is an error in your installation.

To see the available python version, you can use this command.

pyenv install --list

For example, I will install python 3.9.15. So the command will be like this.

pyenv install 3.9.15

Don’t worry if your terminal doesn’t return anything, the process takes a while. Maybe you can leave it for a while to make coffee or something.

If the installation is already done, you can verify if the python version is already installed, you can use the:

pyenv versions

And the result will look like this.

* system (set by /home/user/.pyenv/version)
  3.9.15

The * is mean that system is the default python version. To set python 3.9.15 as the default python, use the command:

pyenv global 3.9.15

After that, check the python version.

python --version  # or python -V

If the python version is 3.9.15 or whatever python version you install, then the python installation is a success. If you want to add another python version, you can just be using pyenv install <version> and if you want to change the python version, you can just use pyenv global <version>.