title: python3 command not found after installing python with pyenv
body: <p>I installed a specific version of python with pyenv. When typed <code>pyenv version</code> in terminal, i see <code>3.5.0 (set by /Users/lcherukuri/.python-version)</code>. But when I typed <code>python3</code>, I got <code>python3 command not found</code>. How to fix this? pip3 is Also not found</p>