Python How to change default version back from python 3.5 to python 2.7
<p>Recently, I just installed anaconda3 for python3, it works well. But then I found out that my python default version has been modified to python3.5 as well. When I type "python" in terminal, it appears like this</p>

<pre><code>Python 3.5.1 |Anaconda 2.4.1 (x86_64)| (default, Dec  7 2015, 11:24:55)
</code></pre>

<p>So I go and check my bash_profile, and found why it has been changed to python3.5:</p>

<pre><code># Setting PATH for Python 3.5
# The orginal version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.5/bin:${PATH}"
export PATH

# added by Anaconda3 2.4.1 installer
export PATH="//anaconda/bin:$PATH"

# added by Anaconda3 2.4.1 installer
export PATH="/Users/chengluli/anaconda/bin:$PATH"

# added by Anaconda3 2.4.1 installer
export PATH="/Users/chengluli/anaconda/bin:$PATH"
export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
eval "$(rbenv init -)"
</code></pre>

<p>After I commented all the texts related to python3.5 and anaconda3. The default changes to python2.7.</p>

<p><strong>However, the problem I have now is anaconda3 is not working. When I type ipython notebook, error occurs.</strong></p>

<p>So I wonder how can I change default python version while having anaconda3 work properly? Or anaconda3 can only work when the default is python3.5. So I need to use anaconda2 instead? Thanks in advance!</p>