title: python: _winreg problem
body: <p>the windows registry may contain keys whose names with embedded nulls</p>
  
  <p>when i call <code>_winreg.OpenKey(key, subkey_string_with_embbeded_null)</code> i get the following error:</p>
  
  <pre><code>TypeError: OpenKey() argument 2 must be string without null bytes or None, not str
  </code></pre>
  
  <p>Q1: is the meaning of the error that python _winreg module has a limitation that it cannot open keys whose names have embbeded nulls?</p>
  
  <p>Q2: how do i get around this limitation?</p>