title: Can't install pip on python 2.7, only python 3
body: <p>I have been trying to install pip for python 2.7, but I am unable to. I want pip to work for both python 2.7 and python 3. Here is a summary of what I have done so far:</p>
  
  <pre><code>python -V
  Python 2.7.15
  
  echo $PATH
  ... /usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin ...
  </code></pre>
  
  <p>I've also done a few checks to know where everything is (I have two '/usr/local/bin/python'). I believe there should only be one?</p>
  
  <pre><code>which -a python
  /usr/local/bin/python
  /usr/local/bin/python
  /usr/bin/python
  
  which python
  /usr/local/bin/python
  
  ls -l $(which python)
  lrwxr-xr-x  1 XXXXX  admin  36 May 24 14:28 /usr/local/bin/python -&gt; ../Cellar/python@2/2.7.15/bin/python
  </code></pre>
  
  <p>When I do:</p>
  
  <pre><code>brew list python | grep pip
  </code></pre>
  
  <p>I only get results for python3, nothing at all for python2</p>
  
  <pre><code>/usr/local/Cellar/python/3.6.5/bin/pip3
  </code></pre>
  
  <p>Things I have tried that do not work, include:</p>
  
  <pre><code>python get-pip.py
  "can't open file 'get-pip.py': [Errno 2] No such file or directory"
  
  brew install pip
  "Error: No available formula with the name "pip" "
  </code></pre>
  
  <p>I appreciate your help! </p>