title: IronPython cannot import module "os"
body: <p>my c# code:</p>
  
  <pre><code>//Create the ScriptRuntime
  engine = Python.CreateEngine();
  //Create the scope for the ScriptEngine
  scope = engine.CreateScope();
  
  
  string pyfile = "D:\\MyAddin\\test.py";
  ScriptSource source = engine.CreateScriptSourceFromFile(pyfile);
  var rt = source.Execute(scope);
  </code></pre>
  
  <p>and my test.py:</p>
  
  <pre><code>import os
  import sys
  ...
  print("test")
  ...
  </code></pre>
  
  <p>I get no problem at build time, but at runtime VS give me a error "cannot import module "os"". Where is the error?</p>