[IronPython] os Module in programs compiled with pyc

Orestis Markou orestis at resolversystems.com
Fri Jan 16 11:19:29 CET 2009

The sys module is special as it's built-in, whereas os is just a python 
module. Try importing other modules such as shutil or unittest to see if 
the plain standard library works.

IronPython doesn't compile the standard library for you - it ships with 
it as normal python source, when installed from the msi. I thought that 
it would add its Lib to sys.path but I may be wrong. Try printing 
sys.path and see if there is any indication of this.


Renaud Durand wrote:
> Hi all,
> I have several issues but I will respect the 1 problem/1 thread rule.
> My exe file is in a folder with all required DLLs. When I'm trying to 
> import the os module I get this:
>  > Unhandled Exception: IronPython.Runtime.Exceptions.ImportException: 
> No module named os
> It works fine with other "Standard python library" modules like 'sys'. 
> Are'nt all the modules in IronPython/Lib folder included in IronPython 
> DLLs ?
> Currently I am using a workaround compiling the os module with my 
> program and it works.
> Any idea ?
> Thanks.
> -- 
> Renaud Durand
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Orestis Markou
Software Engineer,
Resolver Systems Ltd.
orestis at resolversystems.com
+44 (0) 20 7253 6372

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