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Matt Ward

Using the Python Standard Library

Here is a short walkthrough on how to use the Python Standard Library with SharpDevelop 3.0 and IronPython 2.0.


You will need to have SharpDevelop 3.0 and Python 2.5 installed on your machine. These can be downloaded from the following locations.

Note that using Python 2.6 is not supported. The following section assumes that Python 2.5 was installed into the C:\Python25 folder.

Using the Python Standard Library

First we will create an IronPython console application in SharpDevelop. From the File menu select New and then Solution. In the New Project window select the Python category and select the Console Application template.

New Python Console Application template

Give the project a name, select its location and click the Create button.

To use the Python Standard Library the project needs a reference to IronPython.dll, which should be added by default, and a reference to IronPython.Modules.dll. Open the Projects window, if it is not already open, by selecting Projects from the View menu. Right click the project's references and select Add Reference. In the Add Reference dialog first add a reference to mscorlib, this reference is needed since we are going to use the System.Console class to pause the console output. Then select the .NET Assembly Browser tab and click the Browse button. Locate the IronPython.Modules.dll file and select it. This file should be in the following folder:

C:\Program Files\SharpDevelop\3.0\AddIns\AddIns\BackendBindings\PythonBinding

Click OK to close the Add Reference dialog.

In the file change the code to the following:

# Add Python Standard Library to search path. 
import sys

# Use Python Standard Library os module.
import os
print os.getcwd()

# Wait for a key press before closing the console window.
import System
print "Press any key to continue..."

The sys.path.append line adds the Python Standard Library to the search path. After that the os module is imported and the os.getcwd method is called to get the current working directory and this is output to the console window. The last three lines of code are just used to pause the console window so we can see the output.

Compile the above code by selecting Build Solution from the Build menu.

Finally run the application by selecting Run from the Debug menu.

Output from Python Console application.

Published Mar 01 2009, 02:43 PM by MattWard
Filed under: ,



WombatPM said:

You also need to add a reference to mscorlib in order for the example to run without error.

March 19, 2009 9:35 PM

MattWard said:

The Python project templates should really add the mscorlib reference to the project by default or maybe the compiler should reference this by default. The project templates have been fixed in 3.1.

The post does mention adding a reference to mscorlib and to do any serious .NET work with IronPython you will need this reference. In the example however if you remove the last three lines which wait for a key press the code will still work without an explicit reference to mscorlib in the project. In my project I originally had a reference to System, IronPython and IronPython.Modules only. It looks like the compiler will add one anyway if the reference does not exist in the project.

March 20, 2009 8:14 AM
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