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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I'm CC'ing the IPy discussion list, but you are seeing a bug in empty scope initialization that was in 2.6.2. The expected behavior, unless I'm missing something
Dino, Jeff, or Michael points out, is what you're getting with 2.7RC2. I don't recall the time window, but there was a time when Dino and I discussed the default references the ipy engine should apply to scopes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you had to run in 2.6.2, it might be that if you did "import clr" followed by clr.AddReference(…) and then followed by "import System", the code might work.
Or, I'm wrong, and it is just the generator's closure didn't have the right context flowed into it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> paolomoretti [mailto:notifications@codeplex.com]
<br>
<b>Sent:</b> Wednesday, March 09, 2011 9:21 AM<br>
<b>To:</b> Bill Chiles<br>
<b>Subject:</b> IronPython generators' scope [dlr:249060]<o:p></o:p></span></p>
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</div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p style="margin-left:.5in"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">From: paolomoretti<o:p></o:p></span></p>
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<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">Hi,<br>
I have problems to understand how IronPython determines the scripts' scope, especially when I use generators.<br>
<br>
For example, if I run this code (http://pastebin.com/P24BZUJU) with IronPython 2.6.2<o:p></o:p></span></p>
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<pre style="margin-left:.5in;background:white"><span style="color:black">ScriptEngine engine = Python.CreateEngine();<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black"><o:p> </o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:blue">string</span><span style="color:black"> code = </span><span style="color:#A31515">@"<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:#A31515">import System<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:#A31515">print System.Int32(5) # OK<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:#A31515"><o:p> </o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:#A31515">gen = (System.Int32(i) for i in range(1,10))<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:#A31515">for x in gen:<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:#A31515"> print x<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:#A31515">"</span><span style="color:black">;<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black"><o:p> </o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">ScriptSource source = engine.CreateScriptSourceFromString(code, SourceCodeKind.AutoDetect);<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">CompiledCode compiledCode = source.Compile();<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black"><o:p> </o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:blue">try</span><span style="color:black"><o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">{<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black"> compiledCode.Execute(engine.CreateScope());<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">}<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:blue">catch</span><span style="color:black"> (System.Exception ex) </span><span style="color:green">// IronPython.Runtime.UnboundNameException</span><span style="color:black"><o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">{<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black"> Console.WriteLine(ex.ToString());<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">}<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black"><o:p> </o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:blue">try</span><span style="color:black"><o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">{<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black"> compiledCode.Execute(); </span><span style="color:green">// OK</span><span style="color:black"><o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">}<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:blue">catch</span><span style="color:black"> (System.Exception ex)<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">{<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black"> Console.WriteLine(ex.ToString());<o:p></o:p></span></pre>
<pre style="margin-left:.5in;background:white"><span style="color:black">}<o:p></o:p></span></pre>
</div>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif""><br>
<br>
In the first trycatch block I get the the following exception:<br>
<br>
<em><span style="font-family:"Verdana","sans-serif"">IronPython.Runtime.UnboundNameException: global name 'System' is not defined</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at IronPython.Compiler.PythonGlobal.GetCachedValue()</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at IronPython.Compiler.PythonGlobal.get_CurrentValue()</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at __generator_$1(Closure , MutableTuple )</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at IronPython.Runtime.PythonGenerator.MoveNextWorker()</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at IronPython.Runtime.PythonGenerator.System.Collections.IEnumerator.MoveNext()</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at Microsoft.Scripting.Interpreter.FuncCallInstruction`2.Run(InterpretedFrame frame)</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at Microsoft.Scripting.Interpreter.LightLambda.Run2[T0,T1,TRet](T0 arg0, T1 arg1)</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at IronPython.Compiler.PythonScriptCode.RunWorker(CodeContext ctx)</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at IronPython.Compiler.PythonScriptCode.Run(Scope scope)</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at IronPython.Compiler.RuntimeScriptCode.InvokeTarget(Scope scope)</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at IronPython.Compiler.RuntimeScriptCode.Run(Scope scope)</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> at Microsoft.Scripting.Hosting.CompiledCode.Execute(ScriptScope scope)</span></em><br>
<em><span style="font-family:"Verdana","sans-serif""> ...</span></em><br>
<br>
The second trycatch block works fine instead.<br>
<br>
If I run this example with IronPython 2.7 RC2, I don't get any exception.<br>
<br>
Is this a bug, or something I am doing wrong?<br>
<br>
Regards,<br>
<br>
Paolo <o:p></o:p></span></p>
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