title: zsh command cannot found pip
body: <p>How can I use <code>pip</code> in oh-my-zsh? I was trying to install <code>nltk</code> through pip, but it told me <code>zsh: command not found: pip</code>. When I check plugins under <code>.oh-my-zsh/custom/plugins</code>, there is a folder named <code>pip</code>. I don't know what the problem is. </p>
  
  <p><strong>Edit</strong>: </p>
  
  <pre class="lang-bash prettyprint-override"><code>$ echo $PATH
  /home/xxx/bin:/usr/local/bin:/home/xxx/bin:/home/xxx/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
  
  $ type pip
  pip is an alias for noglob pip
  </code></pre>