title: How activate conda environment on demand in macOS zsh Terminal session?
body: <p>This is under macOS Big Sur 11.1, with zsh as the shell (and oh-my-zsh) after a new Anaconda 3 installation.</p>
  <p>Since I do <em>not</em> always want to be using the conda/anaconda python distribution to be used (sometimes I want to be using MacPorts python), in the base environment I executed command:</p>
  <pre><code>conda config --set auto_activate_base False
  </code></pre>
  <p>How do I activate the conda base configuration in a Terminal session &quot;on demand&quot;, now that the <code>conda</code> command is no longer automatically available there?</p>