How to use a C# dll in IronPython
import clr clr.AddReferenceToFileAndPath(r”C:\Folder\Subfolder\file.dll”) is the simplest way as proposed by Jeff in the comments. This also works: import clr import sys sys.path.append(r”C:\Folder\Subfolder”) # path of dll clr.AddReference (“Ipytest.dll”) # the dll import TestNamspace # import namespace from Ipytest.dll