[Python.NET] Running an embedded interpreter

Tue Aug 19 18:15:38 CEST 2014

Hi Serge,
'mbcs' is what python uses to mean the current configured encoding. I would
guess that the encoding of sys.stdout is different when using visual studio
output console than the console.
You could try a different encoding method by setting the PYTHONIOENCODING
environment variable before starting your exe, eg:
SET PYTHONIOENCODING=utf-8:ignore
Look for PYTHONIOENCODING here https://docs.python.org/3/using/cmdline.html
for more details.
Tony
On Tue, Aug 19, 2014 at 2:22 PM, Serge WEINSTOCK <
serge.weinstock at uk.bnpparibas.com> wrote:
> Hi,
>>>> I’m trying to use Python3.2 using the Python.Net version found at:
> https://github.com/renshawbay/pythonnet
>>>> I’m using the following simple test program:
>>>> //=======================================================================
>> using System;
>> using System.IO;
>> using Python.Runtime;
>>>> namespace TestPythonNet
>> {
>> class Program
>> {
>> static void Main(string[] args)
>> {
>> string binDir =
> Path.GetDirectoryName(System.Reflection.Assembly.GetAssembly(typeof(Program)).Location);
>> string pyHome =
> @"D:\src\scratch\TestPythonNet\TestPythonNet\PythonRuntime";
>> PythonEngine.PythonHome =
> @"D:\src\scratch\TestPythonNet\TestPythonNet\PythonRuntime";
>> PythonEngine.ProgramName = "PythonRuntime";
>> Environment.SetEnvironmentVariable("PYTHONPATH",
>> Path.GetFullPath(Path.Combine(pyHome, "DLLs")) + ";" +
>> Path.GetFullPath(Path.Combine(pyHome, "Lib")) + ";" +
>> Path.GetFullPath(Path.Combine(pyHome, "Lib",
> "site-packages")) + ";" +
>> binDir
>> );
>> Environment.SetEnvironmentVariable("PYTHONVERBOSE", "1");
>> PythonEngine.Initialize();
>> PythonEngine.ImportModule("clr");
>> using (Py.GIL())
>> {
>> PythonEngine.RunSimpleString(
>> "import clr; " +
>> "a = clr.AddReference('System'); " +
>> "print(a.Location);" +
>> "from System import Environment;" +
>> "print(Environment.MachineName);");
>> }
>> }
>> }
>> }
>> //=======================================================================
>>>> “D:\src\scratch\TestPythonNet\TestPythonNet\PythonRuntime” is a folder
> where I’ve copied the DLLs and Lib folder from a python 3.2 x86
> distribution.
>>>>>> When I run it from Visual Studio it works fine (I guess it may be related
> to the fact that I’m using python tools for Visual Studio).
>>>> But when I run it from the console, it fails with the output:
>>>> //=======================================================================
>> Traceback (most recent call last):
>> File
> "D:\src\scratch\TestPythonNet\TestPythonNet\PythonRuntime\Lib\site.py",
> line 481, in execsitecustomize
>> import sitecustomize
>> UnicodeEncodeError: 'mbcs' codec can't encode characters in position 0--1:
> invalid character
>> Traceback (most recent call last):
>> File
> "D:\src\scratch\TestPythonNet\TestPythonNet\PythonRuntime\Lib\site.py",
> line 497, in execusercustomize
>> import usercustomize
>> UnicodeEncodeError: 'mbcs' codec can't encode characters in position 0--1:
> invalid character
>>> C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll
>> Traceback (most recent call last):
>> File "<string>", line 1, in <module>
>> UnicodeEncodeError: 'mbcs' codec can't encode characters in position 0--1:
> invalid character
>> //=======================================================================
>>>> The “print(a.Location);" works but not the “from System import
> Environment”. There are also all these errors about mbcs.
>>>> Any idea on what I’m doing wrong?
>>>> Thanks,
>> Serge Weinstock
>>>>> ___________________________________________________________
> This e-mail may contain confidential and/or privileged information. If you
> are not the intended recipient (or have received this e-mail in error)
> please notify the sender immediately and delete this e-mail. Any
> unauthorised copying, disclosure or distribution of the material in this
> e-mail is prohibited.
>> Please refer to http://www.bnpparibas.co.uk/en/email-disclaimer/ for
> additional disclosures.
>> _________________________________________________
> Python.NET mailing list - PythonDotNet at python.org
> https://mail.python.org/mailman/listinfo/pythondotnet
>-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/pythondotnet/attachments/20140819/8631b473/attachment-0001.html>