In my code I'm running:
Python.Runtime.PythonEngine.Initialize();
I also have these defined:
public void AddPythonPath(string path)
{
CheckInitPython();
IntPtr l = Python.Runtime.PythonEngine.AcquireLock();
Python.Runtime.PythonEngine.RunSimpleString("import sys");
Python.Runtime.PythonEngine.RunSimpleString("sys.path.append(\"" +
path.Replace("\\", "\\\\") + "\")");
Python.Runtime.PythonEngine.ReleaseLock(l);
}
public Python.Runtime.PyObject ImportModule(string name)
{
CheckInitPython();
IntPtr l = Python.Runtime.PythonEngine.AcquireLock();
Python.Runtime.PyObject module =
Python.Runtime.PythonEngine.ImportModule(name);
Python.Runtime.PythonEngine.ReleaseLock(l);
if (module == null)
{
throw new libscclient.PythonModuleNotCreatedException(name);
}
return module;
}
And when my code loads a "plugin" python module, it runs this:
string pythonVersionBasePath = GetPythonCodeBaseVersionPath(); //my
dynamic plugin code.
string scriptName = GetPythonScriptName(); //also my dynamic plugin
code.
System.Console.WriteLine("importing module");
Pedestal.AddPythonPath(pythonVersionBasePath); //calling code above
Python.Runtime.PyObject module =
Pedestal.ImportModule(scriptName.Split(new char[] { '.' }, 2)[0]); //calling
code above
System.Console.WriteLine("module imported");
IntPtr l = Pedestal.GetPythonLock();
module.InvokeMethod(GetPythonInitMethodName(), new
Python.Runtime.PyObject[] { Python.Runtime.PyObject.FromManagedObject(this) });
//calling a method by name. the name comes from my dynamic plugin code.
module.Dispose(); //I'm done with the module so I toss it. my code
here registers callbacks.
Pedestal.ReleasePythonLock(l);
On Mar 28, 2013, at 2:09 PM, "lizy10b" <[email protected]> wrote:
> Thank you, Bradley.
> I found a simple sample code on the maillist. Now I could load and execute a
> pure python function in a py file in C#.
>
> And a new problem is that the PythonEngine.ImportModule("modulename") method
> always return NULL in my case. The modulename.py comsumes a third part ctypes
> wrapped library (the Rtree 0.7 python library). It seems the PythonEngine can
> not find it, but actually it has been installed to the default path
> (C:\Python262\Lib\site-packages\rtree) , and the modulename.py file runs
> smoothly under python command line.
> I worte a new py file which only contains a function returning the sys.path,
> and load it in C#, the sys.path seems OK.
> So I don't know what's wrong....
>
> Thanks.
>
> Zhiyu Li
>
>
>
>
> 2013-03-29
> lizy10b
> 发件人： Bradley Friedman
> 发送时间： 2013-03-28 22:15:18
> 收件人： lizy10b
> 抄送： pythondotnet
> 主题： Re: [Python.NET] how to load and execute py file which consumes a thrid
> part C-based python extension in C# code
> What you are looking to do is "embed" a python interpreter in your .net
> project, using pythonnet, and then tell the runtime to execute your python
> script.
>
> I have done this in one of my projects. It does work.
>
> http://pythonnet.sourceforge.net/readme.html#embedding
>
> Sent from my iPad
>
> On Mar 28, 2013, at 8:31 AM, "lizy10b" <[email protected]> wrote:
>
>> Hi there,
>> I am a freshman and new to python.net.
>> I have a *.py script which calls a third part python library, and the
>> library is a ctypes python wrapper of a C++ dll (or say C-based python
>> extension?).
>> Frist I tried to make it using IronPython. IronPython works well when I load
>> a pure python *.py (no third part libraries) file and execute it in C# code.
>> But it failed when I load a *.py which comsumes a thrid part ctypes python
>> wrapper library mentioned above.
>>
>> Then I turn to python.net. But I don't know how to load and execute *.py in
>> C# code using python.net.
>>
>> Thanks.
>>
>> Zhiyu Li
>> Student
>> China
>>
>> 2013-03-28
>> lizy10b
>> _________________________________________________
>> Python.NET mailing list - [email protected]
>> http://mail.python.org/mailman/listinfo/pythondotnet
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