从 IronPython 异常中获取回溯信息答案

【问题标题】：Getting traceback information from IronPython exceptions从 IronPython 异常中获取回溯信息
【发布时间】：2009-09-23 10:48:15
【问题描述】：

我在我的应用程序中托管了 IronPython，每当我捕捉到脚本抛出的异常时，我都会收到这样无用的胡言乱语：

IronPython.NewTypes.System.Exception_1$1: Error occurred during conversion ---> Microsoft.Scripting.ArgumentTypeException: expected int, got DispMethod
   at _stub_$245##245(Closure , CallSite , Object )
   at Microsoft.Scripting.Actions.MatchCaller.Call1[T0,TRet](Func`3 target, CallSite site, Object[] args)
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update1[T,T0,TRet](CallSite site, T0 arg0)
   at _stub_$227##227(Closure , CallSite , Object )
   at IronPython.Runtime.Converter.Convert(Object value, Type to)
   at IronPython.Runtime.Operations.ArrayOps.SetItem(Array data, Int32 index, Object value)
   at _stub_$244##244(Closure , CallSite , Object , Object , Object )
   at Microsoft.Scripting.Actions.MatchCaller.Call3[T0,T1,T2,TRet](Func`5 target, CallSite site, Object[] args)
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update3[T,T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)
   at ConvertToFgf$223##223(Closure , Object , Object , Object )
   at _stub_$192##192(Closure , CallSite , CodeContext , Object , Object , Object , Object )
   at Microsoft.Scripting.Actions.MatchCaller.Call5[T0,T1,T2,T3,T4,TRet](Func`7 target, CallSite site, Object[] args)
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update5[T,T0,T1,T2,T3,T4,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4)
   at Convert$224##224(Closure , Object , Object )
   --- End of inner exception stack trace ---
   at Convert$224##224(Closure , Object , Object )
   at _stub_$42##42(Closure , CallSite , CodeContext , Object , Object , Object )
   at Microsoft.Scripting.Actions.MatchCaller.Call4[T0,T1,T2,T3,TRet](Func`6 target, CallSite site, Object[] args)
   at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
   at Microsoft.Scripting.Actions.UpdateDelegates.Update4[T,T0,T1,T2,T3,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at Run$225##225(Closure )

我想得到的是 python 回溯。有没有办法得到这些信息？

【问题讨论】：

标签： exception ironpython traceback

【解决方案1】：

如果您只需要文本版本，您可以这样做：

engine.GetService<ExceptionOperations>().FormatException(exception);

如果你真的需要 Python track back 对象，我会建议：

Func<PythonTuple> exc_info = engine.Operations.GetMember<Func<PythonTuple>>(engine.GetSysModule(), "exc_info");

将它保存在有用的地方，然后在需要时调用它：

TraceBack tb = (TraceBack)exc_info()[2];

只要您发现异常，它就会起作用。

一个稍微受支持但更简单的方法是：

TraceBack tb = PythonOps.GetExceptionInfoLocal(context, exception)[2];

但是您需要一个 CodeContext 来执行此操作。在 2.0 中，您可以通过以下方式获取 CodeContext：

new CodeContext(new PythonDictionary(), HostingHelpers.GetLanguageContext(engine));

【讨论】：