IronPython, import, and clr.AddReferenceByPartialName

Question

In IronPython 2.7.1, I can import some .NET assemblies by name:

>>> from System.Collections import *
>>> from System.IO import *

Others give me an error:

>>> from System.Xml import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named Xml

Doing the following fixes the error:

>>> import clr
>>> clr.AddReferenceByPartialName('System.Xml')
>>> from System.Xml import *

Why do I have to call clr.AddReferenceByPartialName for some assemblies but not others?

cwa · Accepted Answer · 2012-03-02 18:04:08Z

3

Some assemblies, like mscorlib.dll, are there by default. If the documentation for the class you want says it's in mscorlib (e.g., http://msdn.microsoft.com/en-us/library/system.collections.arraylist.aspx), then you won't need to add a reference, otherwise you will. It's similar to when/why you need to add references to your C# project.

answered Mar 2, 2012 at 18:04

cwa

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