[Python.NET] calling Python via Python.Runtime DLL from IronPython

[Tony Roberts]

This problem could be caused by two different incompatible CPython
interpreters being installed. Possibly it's a .pyc file generated from
another version of Python is being imported (and failing to import).

Can you check what python27.dll is being used? You should be able to see it
in visual studio in the modules window, or with a tool like sysinternals
process explorer. If that dll is one left over from an old install of
Python try either removing it, or setting your PATH so the correct one is
picked up.

One other thing you might want to try is a fresh install of Python (making
sure that no old python27.dll files are being used) as your pyc caches
might be in a weird state if the problem is caused by conflicting Python
installs.

A quick check to see if it is something like that would be to delete
copy_reg.pyc and see if it gets any further.

Best regards,
Tony

On Fri, Apr 22, 2016 at 3:19 PM Denis Akhiyarov <denis.akhiyarov at gmail.com>
wrote:

> Are you able to run PythonEngine.Initialize() from c#, not ironpython?
>
>
> On Thursday, April 21, 2016, Cameron Hayne <cameron.hayne at introspect.ca>
> wrote:
>
>> I tried calling  Py_SetPythonHome("C:\\Python27")   before calling
>> PythonEngine.Initialize(),  but I got the same problem (re ‘copy_reg’ not
>> found).
>> Any other suggestions?
>> --
>> Cameron Hayne
>> cameron.hayne at introspect.ca
>>
>>
>> On Apr 19, 2016, at 4:37 PM, Tony Roberts <tony at pyxll.com> wrote:
>>
>> > No need to import the c Python extension - from IronPython you would be
>> able to reference the Python.runtime assembly without it. The problem
>> you're having sounds like the python path isn't correct for cPython. You
>> could try setting the PYTHONHOME environment variable and see if that gets
>> you any further.
>> >
>> > Best regards,
>> > Tony
>> > On Tue, Apr 19, 2016 at 9:30 PM Denis Akhiyarov <
>> denis.akhiyarov at gmail.com> wrote:
>> > Did you try this code?
>> >
>> > http://www.voidspace.org.uk/ironpython/cpython_extensions.shtml
>> >
>> > On Tue, Apr 19, 2016 at 2:09 PM, Cameron Hayne <
>> cameron.hayne at introspect.ca> wrote:
>> > Should it be possible to call Python (CPython) code from IronPython (an
>> IronPython script) via the Python.Runtime DLL ?
>> > I.e. an IronPython script that imports the Python.Runtime DLL and then
>> calls the functions provided by that DLL.
>> > In my preliminary tests, I get an error about ‘copy_reg’ not being
>> found. This error seems to happen when calling PythonEngine.Initialize().
>>
>>
>>
>>
>>
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