title: Pyroot AttributeError while importing histograms
body: <p>I have a problem with pyroot. When I try to import a ROOT histogram I get the same AttributeError all the time. </p>
  
  <pre><code>&gt;&gt;&gt; from ROOT import TH1F
  AttributeError: type object 'TArray' has no attribute '__getitem__'
  
  During handling of the above exception, another exception occurred:
  
  SystemError: &lt;built-in method mro of ROOT.PyRootType object at 0x328fb18&gt; returned a result with an error set
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: cannot import name 'TH1F'
  </code></pre>
  
  <p>I also tried rootpy which doesn't work. Probably related?</p>
  
  <p>I have Python 3.5 installed and did a clean install of ROOT with gcc 5.2.0. The Python module is listed when I run <code>root-config --features</code>.</p>
  
  <p>Any ideas? Or solutions?</p>