1. Jian, can you convert your code to simplified interface using Py.GIL() calls? If not possible, please let us know why.
https://github.com/pythonnet/pythonnet/blob/master/README.md 2. Your first code sample (unit test) is self-contained, but in second code sample (UI) it is not clear where you acquire and release the GIL? 3. Finally can you post this as an issue on github? https://github.com/pythonnet/pythonnet/issues/new Thanks, Denis On Thu, Jul 28, 2016 at 8:51 AM, Jian Wang <wjchic...@gmail.com> wrote: > Dear PythonNet group, > > I am working on a c# project which would like to access functions written > in python from time to time. Below is a wrapper function. > > I have a unittest setup for this function. Everytime I run this unittest, > it will get information from python world as I desired. > > public ScriptContext GetContextFromScript() > { > ScriptContext scriptContext; > try > { > if (!PythonEngine.IsInitialized) > PythonEngine.Initialize(); > var threadState = PythonEngine.BeginAllowThreads(); > var gilState = PythonEngine.AcquireLock(); > > PyObject mod = > PythonEngine.ImportModule(this.GetModuleName()); > PyObject instance = mod.InvokeMethod("Strategy", new > PyTuple()); > scriptContext > =(ScriptContext)instance.InvokeMethod("SetContext", new > PyTuple()).AsManagedObject(typeof (ScriptContext)); > > PythonEngine.ReleaseLock(gilState); > PythonEngine.EndAllowThreads(threadState); > PythonEngine.Shutdown(); > } > catch (Exception ex) > { > throw; > } > return scriptContext; > } > > However, when I launch the UI and call this function by clicking some > button, the program hangs at PythonEngine.Initialize(). > > After debugging into the PythonNet source code, I found when calling > through UI, the RunTime.Initialize() will return true for > Runtime.Py_IsInitialized(). > > internal static void Initialize() > { > is32bit = IntPtr.Size == 4; > > if (0 == Runtime.Py_IsInitialized()) > { > Runtime.Py_Initialize(); > } > > if (0 == Runtime.PyEval_ThreadsInitialized()) > { > Runtime.PyEval_InitThreads(); > } > } > > And the whole initialize process will hang when result.Dispose() is > called. It actually trying to acquire lock but cannot get it. > > using (StreamReader reader = new StreamReader(stream)) > { > // add the contents of clr.py to the module > string clr_py = reader.ReadToEnd(); > PyObject result = RunString(clr_py, > module_globals, locals.Handle); > if (null == result) > throw new PythonException(); > result.Dispose(); > } > > It looks like something happend before code reaching this pythong wrapper > function. PythonEninge is partially initialized with > Runtime.Py_IsInitialized() = true and Runtime.PyEval_ThreadsInitialized() = > false. > > Questions > 1. what could be the possible cause for this situation? > 2. If I cannot find the root cause and put BegineAllowThreads() there, > what could be a solution for it? > > Many thanks! > > Jian > > _________________________________________________ > Python.NET mailing list - PythonDotNet@python.org > https://mail.python.org/mailman/listinfo/pythondotnet >
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