title: Traceback error in terminal when trying to use python
body: <p>I am getting this error whenever I try to use terminal. I was initially trying to use pip to install html5lib, but now I can't even use python. Anyone have any idea what is going on? </p>
  
  <pre><code>Dans-MacBook-Pro:~ DanLee$ python
  Traceback (most recent call last):
  File "/Users/DanLee/anaconda/lib/python2.7/site.py", line 62, in     &lt;module&gt; 
  import os
  File "/Users/DanLee/anaconda/lib/python2.7/os.py", line 49, in &lt;module&gt;
  import posixpath as path
  File "/Users/DanLee/anaconda/lib/python2.7/posixpath.py", line 450, in  &lt;module&gt;
  plt.plot(years,gdp, color = 'green', marker = 'o', linestyle = 'solid')
  NameError: name 'plt' is not defined
  Dans-MacBook-Pro:~ DanLee$ pip install html5lib
  Traceback (most recent call last):
  File "/Users/DanLee/anaconda/lib/python2.7/site.py", line 62, in &lt;module&gt;
  import os
  File "/Users/DanLee/anaconda/lib/python2.7/os.py", line 49, in &lt;module&gt;
  import posixpath as path
  File "/Users/DanLee/anaconda/lib/python2.7/posixpath.py", line 450, in &lt;module&gt;
  plt.plot(years,gdp, color = 'green', marker = 'o', linestyle = 'solid')
  NameError: name 'plt' is not defined
  </code></pre>