title: I got a syntax error by activating environment on Conda
body: <p>Here is the complete code that I typed in:</p>
  <p><strong>input:</strong></p>
  <pre><code>conda create --name my_app27 python=2.7 flask sqlalchemy --yes
  </code></pre>
  <p><code>source activate my_app27</code></p>
  <p><strong>output:</strong></p>
  <pre><code>File &quot;&lt;ipython-input-2-9a6e240537c9&gt;&quot;, line 1
      source activate my_app27
                    ^
  SyntaxError: invalid syntax
  </code></pre>
  <p>And then I tried another one</p>
  <p><em><strong>input:</strong></em></p>
  <pre><code>conda activate my_app27
  </code></pre>
  <p><strong>output:</strong></p>
  <pre><code>    CommandNotFoundError: Your shell has not been properly configured to use 'conda activate'.
      To initialize your shell, run
      
          $ conda init &lt;SHELL_NAME&gt;
      
      Currently supported shells are:
        - bash
        - fish
        - tcsh
        - xonsh
        - zsh
        - powershell
      
      See 'conda init --help' for more information and options.
      
      IMPORTANT: You may need to close and restart your shell after running 'conda init'.
  
  
  Note: you may need to restart the kernel to use updated packages.
  </code></pre>
  <p>Why is that?? What should I do if I get a syntax Error by activating the environment?</p>