title: Why is the plot generated from ggplot not showing up?
body: <p>I am unable to display the plot from <code>ggplot</code>. I've tried something like</p>
  
  <pre><code>import pandas as pd
  import pylab as plt
  import statsmodels.api as sm
  from ggplot import *
  
  df = pd.DataFrame.from_csv('file.csv', index_col=None)
  x=df['X']
  y=df['Y']
  plt=ggplot(data=df,aes(x=x, y=y)) +\
      geom_line() +\
      stat_smooth(colour='blue', span=0.2)
  plt.show()
  </code></pre>
  
  <p>Why is it not showing up?</p>