title: How do I install pip for python 3.8 on Ubuntu without changing any defaults?
body: <p>I'm trying to install <code>pip</code> for <code>Python 3.8</code> on an <code>Ubuntu 18.04 LTS</code>. <br></p>
  <blockquote>
  <p>I know this has been asked way too many times. But those questions do not concern keeping Ubuntu's defaults specifically. And the answers on those questions either don't work or go on to suggest something so drastic that it would break the system - e.g. change default <code>python3</code> version from <code>3.6</code> to <code>3.8</code>. You <strong>SHOULDN'T</strong>!</p>
  </blockquote>
  <p>So far, I've been able to install <code>python3.8</code> successfully using the <code>PPA</code> - <code>ppa:deadsnakes/ppa</code>:</p>
  <pre><code>sudo add-apt-repository ppa:deadsnakes/ppa
  sudo apt update
  sudo apt install python3.8
  </code></pre>
  <p>Changed <code>python</code> command from <code>python2</code> to <code>python3.8</code> using <code>update-alternatives</code>:</p>
  <pre><code>update-alternatives --remove python /usr/bin/python2
  sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.8 10
  </code></pre>
  <p>Now, I get <code>python 3.8</code> when I run <code>python --version</code>: <br></p>
  <blockquote>
  <p>Python 3.8.5</p>
  </blockquote>
  <p>The problem is, I still can't install <code>pip</code> for <code>Python 3.8</code>. <br>
  If I try to install <code>python3-pip</code>, it installs <code>pip</code> for <code>Python 3.6</code> since <code>python3</code> still points to <code>python3.6.9</code>, and I intend to keep it that way. <br>
  Try installing <code>python-pip</code>, and it will install <code>pip</code> for <code>Python 2.7</code>. <br>
  Also there's no such package as <code>python3.8-pip</code>, so I can't install it like:</p>
  <pre><code>sudo apt install python3.8-pip
  </code></pre>
  <p>Output:</p>
  <blockquote>
  <p>E: Unable to locate package python3.8-pip <br>
  E: Couldn't find any package by glob 'python3.8-pip' <br>
  E: Couldn't find any package by regex 'python3.8-pip'</p>
  </blockquote>
  <p>What can I do to install <code>pip</code> for <code>Python 3.8</code> on an Ubuntu 18.04?</p>