[IronPython] change in standard library behavior for compiled .exe/.dll???

Ken MacDonald drken567 at gmail.com
Tue Oct 5 23:27:21 CEST 2010

I've been looking at the .exe's we built - using pyc.py - with IP 2.5/.Net
3.5 and IP2.7 / .NET 4.0. In the 2.7 .exe, it appears that the imports (like
"os") are not being built into the .exe/.dll, but instead are required to be
imported in source form, e.g. "os.py" must be somewhere on sys.path. In the
IP 2.5 .exe's we had been building, they would run fine on machines without
the IP standard library installed at all, in other words, with "os.py" not
present on the machine at all. We did notice that the .exe in question went
from being 2.9 MB in it's IP 2.5 incarnation, down to 1.2 MB in the IP 2.7
version, and the newer version requires that the source code for the IP
standard library be on the path. Is this a deliberate change in behavior? We
never had to package the standard library source when we sent out .exe's to
customers before

>"os" is not an assembly but a Python module from the standard library. You
need to ensure >that the Python standard library (or the parts that you use
and their dependencies) is on the >path.

> All the best,
> Michael Foord
>  and how do I ensure it gets found from my .exe - is there a specific env.
> variable, or the Windows %PATH% e.v., or something I haven't AddReference'd
> to????
> Thanks,
> Ken
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