title: ImportError: No module named backend_tkagg
body: <p>I have such imports and code:</p>
  
  <pre><code>import pandas as pd
  import numpy as np
  import statsmodels.formula.api as sm
  import matplotlib.pyplot as plt    
  
  
  #Read the data from pydatasets repo using Pandas
  url = './file.csv'
  white_side = pd.read_csv(url)    
  #Fitting the model    
  model = sm.ols(formula='budget ~ article_size',
                 data=white_side,
                 subset=white_side['producer'] == "Peter Jackson")
  fitted = model.fit()
  print fitted.summary()
  </code></pre>
  
  <p>After execution of this code I have such errors:</p>
  
  <pre><code>/usr/bin/python2.7 /home/seth/PycharmProjects/osiris_project/PMN_way/start.py
  Traceback (most recent call last):
    File "/home/seth/PycharmProjects/osiris_project/PMN_way/start.py", line 5, in &lt;module&gt;
      import matplotlib.pyplot as plt
    File "/usr/lib64/python2.7/site-packages/matplotlib/pyplot.py", line 98, in &lt;module&gt;
      _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
    File "/usr/lib64/python2.7/site-packages/matplotlib/backends/__init__.py", line 25, in pylab_setup
      globals(),locals(),[backend_name])
  ImportError: No module named backend_tkagg
  
  Process finished with exit code 1
  </code></pre>
  
  <p>I`m using openSUSE and pycharm community edition latest version with installed pandas, numpy, etc
  How can i fix this problem?</p>