title: Why Python line plot shows : Don't have an account? plot.ly
body: <p>Actually I am new in python.  </p>
  
  <p>When I am trying to compile the following code:  </p>
  
  <pre><code>import matplotlib.pyplot as plt
  
   import plotly.plotly as py
   # Learn about API authentication here: https://plot.ly/python/getting-started
   # Find your api_key here: https://plot.ly/settings/api
  
   x = [1,2,3,4]
   y = [3,4,8,6]
  
    plt.plot(x, 'o')
    plt.plot(y)
    fig = plt.gcf()
  
      plot_url = py.plot_mpl(fig, filename='mpl-line-scatter')
  </code></pre>
  
  <p>It shows the following message and don't give any output.  :  </p>
  
  <pre><code> mks@mks-H81M-S:~/Desktop/pythonPrograms$ python plot.py 
   Aw, snap! We don't have an account for ''. Want to try again? You can        authenticate with your email address or username. Sign in is not case    sensitive.
  
   Don't have an account? plot.ly
  
   Questions? support@plot.ly
   xdg-open - opens a file or URL in the user's preferred application
  
    Synopsis
  
   xdg-open { file | URL }
  
   xdg-open { --help | --manual | --version }
  
   Use 'man xdg-open' or 'xdg-open --manual' for additional info.
   mks@mks-H81M-S:~/Desktop/pythonPrograms$    
  </code></pre>
  
  <p>I don't know what is this and how to fix it. Help.</p>