title: python installed but not recognised by zsh
body: <p>I am using a Catalina macOS. I previously was able to work with my python installations with ease on this system. But today after updating other packages, such as wget and julia, I have encountered these errors <code>zsh: command not found: python3.8</code> on my terminal. Following suggestions on <a href="https://stackoverflow.com/questions/28674445/export-of-pythonpath-from-zshrc-not-working">these</a> <a href="https://stackoverflow.com/questions/58423609/problems-using-zsh-with-catalina-python-python3-pip-pip3-path-zshrc-etc">links</a> I have tried to modify the PATH and zshrc but none of these approaches enables me to solve my problem.
  I would be grateful if you can share your suggestions on how to deal with this issue.</p>
  <p>Here are some of the outputs of my system.</p>
  <p>zshrc:</p>
  <pre><code>vi ~/.zshrc
  
  alias python=/usr/local/bin/python3.8
  # &gt;&gt;&gt; conda initialize &gt;&gt;&gt;
  # !! Contents within this block are managed by 'conda init' !!
  __conda_setup=&quot;$('/Users/shasa/anaconda3/bin/conda' 'shell.bash' 'hook' 2&gt; /dev/null)&quot;
  if [ $? -eq 0 ]; then
      eval &quot;$__conda_setup&quot;
  else
  if [ -f &quot;/Users/shasa/anaconda3/etc/profile.d/conda.sh&quot; ]; then
      . &quot;/Users/shasa/anaconda3/etc/profile.d/conda.sh&quot;
  else
      export PATH=&quot;/Users/shasa/anaconda3/bin:$PATH&quot;
  fi
  fi
  unset __conda_setup
  # &lt;&lt;&lt; conda initialize &lt;&lt;&lt;
  </code></pre>
  <p>python:</p>
  <pre><code>which python
  python: aliased to /usr/local/bin/python3.8
  </code></pre>
  <p>PATH:</p>
  <pre><code>echo $PATH 
  /Users/shasa/anaconda3/bin:/Users/shasa/anaconda3/condabin:/opt/local/bin:/opt/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/opt/X11/bin:/Library/Apple/usr/bin
  </code></pre>
  <p>Edit 1: In <code>/usr/local/bin/</code>, I can see that python3@, python3.9@ and python3.8@* are present. Do you think the extra * near python3.8@ can cause this problem? If yes, how can resolve that?</p>