title: Error: No similarly named formulae found. Error: No available formula or cask with the name "python"
body: <p>So, I'm using macOS Big Sur. So I typed:</p>
  <p>python --version</p>
  <p>Python 2.7.16</p>
  <p>brew install python</p>
  <p>I got this error message when I want to update my python via my terminal.</p>
  <pre><code>Error: No similarly named formulae found.
  Error: No available formula or cask with the name &quot;python&quot;.
  It was migrated from homebrew/cask to homebrew/core.
  </code></pre>
  <p>I would like to update it to Python 3, so when I run my commands on VSC. I can just type python instead of python3. What does this error message mean?</p>