title: matplotlib using PyCharm on Windows won't plot graphs, no error
body: <p>I run</p>
  
  <pre><code>import matplotlib.pyplot as plt
  plt.plot(range(0, 10, 1)) #or "plt.plot(range(10))"
  plt.show()
  </code></pre>
  
  <p>and it does nothing (except saying "Process finished with exit code 0" ). I am using PyCharm, on Windows 7, I installed matplotlib via PyCharm's package manager. I installed python 2.7 and PyCharm today (I practiced it for a month at codecadamy.com but I wanted to get accustomed to real conditions), so I am noob, and it can happen that the problem is trivial.</p>
  
  <p>I tried various codes at matplotlib.org with no results.</p>