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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Hi ~<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> I’m trying to port some VB.NET code to IronPython; the goal is to access third-party .NET functionality through Python. I’ve managed to connect to the relevant Interop .dll files and expose the API but I’m having trouble reproducing the VB.NET functionality from Python (most likely due to my lack of familiarity with .NET itself).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> In VB.NET, this works just fine: <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:.75pt;margin-bottom:0in;margin-left:.75pt;margin-bottom:.0001pt'><span style='font-size:10.0pt;font-family:"Courier New"'>Dim A As Type <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:.75pt;margin-bottom:0in;margin-left:.75pt;margin-bottom:.0001pt'><span style='font-size:10.0pt;font-family:"Courier New"'>Dim Name As String <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:.75pt;margin-bottom:0in;margin-left:.75pt;margin-bottom:.0001pt'><span style='font-size:10.0pt;font-family:"Courier New"'>Dim Option As Boolean <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:.75pt;margin-bottom:0in;margin-left:.75pt;margin-bottom:.0001pt'><span style='font-size:10.0pt;font-family:"Courier New"'>Dim Err As Integer <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:.75pt;margin-bottom:0in;margin-left:.75pt;margin-bottom:.0001pt'><span style='font-size:10.0pt;font-family:"Courier New"'>Dim value As Object <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:.75pt;margin-bottom:0in;margin-left:.75pt;margin-bottom:.0001pt'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:.75pt;margin-bottom:0in;margin-left:.75pt;margin-bottom:.0001pt'><span style='font-size:10.0pt;font-family:"Courier New"'>value = A.function(Name, Option, Err)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> In IronPython I am trying (pseudo-code):<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>import clr<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>clr.AddReferenceToFileAndPath("relevant dll")<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>from API.Interop.whatever import Type<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>A = Type()<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>value = A.function("Name", True, err)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Two issues / questions: <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoListParagraph style='margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The IronPython code above produces: </span><span style='font-size:10.0pt;font-family:"Courier New"'>TypeError: Cannot create instances of Type because it is abstract</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>. Why is an abstract Python class being created and do I have any control over this?<o:p></o:p></span></p><p class=MsoListParagraph style='margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Changing the code to access the functions of Type directly (e.g. Type.function()) results in a “self” argument being expressed as the first argument in the function. i.e. the syntax expected is now Type.function(self, string, boolean, int). I’m familiar with “self” only in the context of defining class functions and not outside of a class definition. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>My guess is that I’m not understanding / using the .NET <---> Python conversion correctly. Any advice or guidance would be greatly appreciated.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>~Mike C. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>