[IronPython] Integration

Dino Viehland dinov at microsoft.com
Fri Sep 3 03:23:25 CEST 2010

To expose a whole namespace the simplest way is probably to call scriptRuntime.LoadAssembly(some_assembly);  All of the public types will then be available for importing from IronPython.  That means they won't all be available at the top-level.  If that's not ok you could use reflection and call DynamicHelpers.GetPythonTypeFromType(...) and inject all the types you want.

As for interop the performance should be fine.  When using dynamic from C# the overhead should basically be similar to the overhead of calling a function within Python.  And for Python calling into C# the overhead is the same as any Python code calling into any of the runtime - in other words pretty darn fast.  For a simple function call to a Python function last I measured I believe it was around 40 instructions on x86 to perform the call.

For example on my laptop this runs in about 1/3 of a second and performs 10 million function calls:

import time

def f():
                def g(): pass
                for i in xrange(10000000):

s = time.clock()
e = time.clock()

print e - s

So what probably matters a lot more is what the function is doing.

From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Iivari Mokelainen
Sent: Thursday, September 02, 2010 9:29 AM
To: users at lists.ironpython.com
Subject: [IronPython] Integration

Salut, fellow coders!

I have an application where i need some live coding to debug and use it. I've been coding in C# for ages now.

I looked into different languages, and found python. And obviously fell in love.
Now i have a home-made interactive python console with my application. I implemented suggestions with dir() and so on.

The problem im facing is that I need to integrate whole application with the console now. I know I can expose types and variables thru scope.SetVariable but what I need is to expose a whole namespace to the scope.

Any help would be appreciated.

P.S. How fast is interop between python and C#? Would it be ok to have a python function as dynamic in C# and calling it about 250 times a second?

    Iivari Mokelainen
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