[Python.NET] Setting PYTHONPATH from code

Sharon Rozenblum Sharon.Rozenblum at sandisk.com
Mon Feb 28 14:48:39 CET 2011


Hi!

Tried after your mail.

Does not change...

Regarding the PYTHONPATH:


I change it with code (System.Environment.SetEnvironmentVariable("PYTHONPATH",PathValue)) and it does not help me at the first run of the application. (I am getting Null value from the ImportModule)
But, after closing the application & opening it again it works (event if changing the PYTHONPATH in the code) with the PYTHONPATH that was set in the run before...

Any Idea?

Thanks,

SHARON

From: baranguren at gmail.com [mailto:baranguren at gmail.com] On Behalf Of Benjamin Aranguren
Sent: Sunday, February 27, 2011 6:08 PM
To: Sharon Rozenblum
Cc: pythondotnet at python.org
Subject: Re: [Python.NET] Setting PYTHONPATH from code

On Wed, Feb 23, 2011 at 5:37 AM, Sharon Rozenblum <Sharon.Rozenblum at sandisk.com<mailto:Sharon.Rozenblum at sandisk.com>> wrote:
Hi!

Trying to do as you said:


            string script = "import sys\nsys.path.insert(0, '" + modulePath + "')";
Have you tried using a semi colon instead of new line?
            string script = "import sys; sys.path.insert(0, '" + modulePath + "')";

            IntPtr pythonLock = PythonEngine.AcquireLock();




            PythonEngine.RunSimpleString(script);
            PythonEngine.ReleaseLock(pythonLock);

And then:

            IntPtr gs = PythonEngine.AcquireLock();




            pyportal = PythonEngine.ImportModule(moduleName);
            if (pyportal == null)
            {
                                ...
                            }
           ...

I got Null value from the ImportModule.

When setting the PYTHONPATH manually in the system variables with the "modulePath" and opening the VS is works.

Any idea?

Thanks,

SAHRON


From: Oleksii Bidiuk [mailto:oleksii.bidiuk at gmail.com<mailto:oleksii.bidiuk at gmail.com>]
Sent: Thursday, February 10, 2011 2:21 PM
To: Sharon Rozenblum
Cc: pythondotnet at python.org<mailto:pythondotnet at python.org>
Subject: Re: [Python.NET] Setting PYTHONPATH from code

Hi Sharon,

What do you want to achieve with this? If you want to provide path for loading your own modules you can change the sys.path value by e.g. running a 'initialization' script with

import sys
sys.path.insert(0, 'your/own/path')

You can build up the script above in C# by inserting the path you need and then performing e.g. RunSimpleString(<script>) like

string script = "import sys\nsys.path.insert(0, '" + <variable_with_path> + "')");
IntPtr pythonLock = AcquireLock();
RunSimpleString(script);
ReleaseLock(pythonLock);

Does this help?

2011/2/10 Sharon Rozenblum <Sharon.Rozenblum at sandisk.com<mailto:Sharon.Rozenblum at sandisk.com>>
Hi!

Can someone tell me how to set PYTHONPATH variable in code when working with Python.Runtime.dll without changing the value in the system variables before.

Thanks

SHARON


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--
oleksii

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